FLC Technology FLC 8N

General Information

The latest verion of FLC8


With a New sound, wider soundstage
Solid and durable Metal shell
36 Sound signature Combinations
Standard 0.78mm connector

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Drivers: 8.6mm Dynamic Driver+Dual Balanced Armature Drivers
Frequency Response: 20Hz~20KHz
Sensitivity: 107dB/mW @1KHz
Impedance: 11 Ω
Connector: 0.78mm Two-Pin
Plug: 2.5mm Balanced or 3.5mm Gold-plated L-Plug

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Latest reviews

Pros: very flexible tuning for almost all frequency regions, detail, lots of accessories, build quality, fit, safe choice for many
Cons: cable still not the best (springy), tiny bass filters are a hassle to deal with, slightly sharp timbre, vocal staging could be more precise
The FLC8n is a three-driver hybrid design (single dynamic, dual BA) IEM from FLC Technologies. It is the latest update to the previous generation of the design, the FLC8s. The FLC8s was a name that would pop up fairly often in my days of browsing r/headphones, commonly recommended for being a strong purchase in the $300 range. Let’s see if the updated 8n can live up to the legacy that FLC has built for themselves.

I’d like to thank Andrew from Musicteck for setting me up with the FLC8n for review. I will be assessing the overall quality of the product with as little bias as possible.

The FLC8n can be picked up from Musicteck from the following link:

FLC8n @ Musicteck.com

The FLC8n comes packaged with a plethora of accessories. I am fairly impressed here. In the box, you can find a ‘tweezer’ to help fiddle with the filter system, the IEMs & cable, filters (and spare filters in case you lose some, I suppose), a solid selection of tips, clips, and other doodads.

A quick comment on the included tips (not shown in photo below: those are third-party tips) — they feel like they are of pretty decent to high quality, but have a more cylindrical shape to them as opposed to the conventional ‘dome’ shaped silicone tips.

The 8n also comes in a hefty milled aluminum case, that has a screw-on lid. Neat to have, and would absolutely protect your IEMs from the elements — but probably not the most practical for carrying around. It’s quite heavy, and a bit bulky (but no larger than a Pelican 1010, so your call).


The original FLC8s had an ungodly springy and stiff cable, which stuck out like a sore thumb in daily use. Thankfully, the FLC8n seems to attempt to address the poor quality of the previous generation’s cable. The cable’s outer material looks more or less the same, sporting a dark teal sheathing with a very slight rubbery coating. It has the slightest bit of ‘stick’ to clothing and such, but not enough for me to consider it a big deal. The splitter and connectors are cased in a semi-hard, translucent blue plastic. Most importantly, the core of the cable feels to be far less stiff than the previous cable, it’s actually fairly flexible and soft.

Unfortunately it still has a noticeable springiness, as coiling it up will simply result in it ‘jumping’ back open.


The 8n seems to be put together well. There aren’t any obvious shortcomings to its build quality, with its CNC’d aluminum construction and detachable cable. The housing’s design is also different from the previous 8s, it seems to be more ergonomically shaped — though the old 8s didn’t give me any issues with comfort, I could see many preferring the more conventional design of the new 8n. Weight is nothing out of the ordinary as well; it isn’t light enough to feel cheap nor too heavy to be comfortable.

The nozzle is longer than the typical IEM, allowing for a fairly deep insertion with smaller tips. The aluminum craftsmanship is good, though the housing has very evident seams that aren’t 100% aligned with each other. The FLC logo is embossed just below the MMCX port on each IEM. The three sound adjustment options are located in the nozzle, and two filtered vents on the medial / lateral sides of the housing. There are three small vents spaced in a triangular organization on the medial side of each IEM.


The FLC8n, as many are aware, have a configurable sound tuning system that was first introduced with the FLC8s. While most filter-based tuning systems seem to have simple adjustments in the upper frequency regions using different nozzles, the 8n takes it two steps further by allowing customization in the bass and subbass frequencies as well.

There are three categories to make adjustments to: ultra-low frequency, low frequency, and mid-high frequency filters. The various plugs / nozzles are conveniently self-contained a blue metal pill keychain (which I assume is waterproof).

Unfortunately, even with the included tweezers for changing filters, the bass frequency plugs are kind of a sore to fiddle with — this system carries over directly from the 8s, with minimal changes. They’re very tiny and a bit of a chore to remove from the IEM. However, once you find your preferred sound I imagine you wouldn’t be changing the filters much. I also noticed that the threading on the interchangeable nozzles on the 8n are of much higher quality than other IEMs I’ve tried with this system (screwing them on/off is a much smoother, quieter experience than the BGVP DMG and LZ A4).


After testing the various filters, I found that my preferences aligned best with the default configuration of filters:
  • Red (highest subbass)
  • Gray (medium bass)
  • Gold (most mids, least treble)
This setup allows the FLC8n to have a gentle lift in the subbass region, sloping gently downward into the lower midrange. Vocals are given extra clarity and presence with a lift in the upper midrange, where the 8n then peaks in the lower treble and sits tamely afterwards.

I found the other filters to make easily noticeable changes to the sound — these are not smaller, debatable changes like cables and sources. In other words, this IEM can be configured to the point where someone who enjoys one sound configuration, can easily dislike another configuration.

TRANSLUCENT: light bass, still a bit punchy. Works nicely with acoustic / orchestral tracks (but is it worth the trouble switching the tiny filters for specific tracks?).
GREY: slightly north of neutral, not overpowering. IMO the optimal amount for my preference.
BLACK: very heavy midbass, a bit boomy, and noticeable lower midrange bleeding. The basshead filter of choice.

TRANSPARENT: severe subbass roll off. Probably wouldn’t ever use this.
GUNMETAL: sounds about right in terms of quantity, rumble is there but not very ear-tickling. This sounds the most natural to me — I like this one, but I stick to the red subbass plug to keep things interesting.
RED: Lift in the subbass, very rumbly and authoritative. Can sometimes get fatiguing, which is where the gunmetal comes into play. I like this one, but I call it a draw with gunmetal.


GOLD: upper midrange is boosted generously but not overdone, treble has good energy and decent extension.
BLUE: midrange sounds sucked out, treble is unnaturally dark and scooped out.
GREEN: more sparkle to the treble, more energetic. Lower treble seems to have extra shimmer. Possibly fatiguing to some.
GUNMETAL: upper midrange is less bumped, warmer, a little more veiled than gold. Treble seems more / less similar.

With my preferred configuration, the FLC8n has a bass presentation that leans towards a deep subbass rumble with a more tame midbass kick. Not many IEMs lean towards this bass balance, so the FLC8n’s versatility in fine-tuning the sound proves to come in handy here. As a result, the FLC8n provides a meaty, thick low end, avoiding any noticeable congestion or confusion between the midbass and lower midrange frequencies. The subbass extends down as low as I’d like with the dynamic driver. The midbass is controlled, yet punchy enough to bring authority to the low end. The implementation of the DD in the hybrid config seems to be well done, as I can’t find any distinct signs of incoherence in the tuning. However, the bass of the FLC8n could benefit more from some improvements in technicalities, particularly texturing and microdynamics.

I’ve chosen the gold filter configuration as my preferred setup, emphasizing the midrange with a neutral treble tuning. Thankfully (and surprisingly), the FLC8n does not have the instantly noticeable midrange glariness and nasal timbre of the FLC8s. The FLC8n’s midrange is well-isolated from its neighboring bass frequencies, I can’t detect any obtrusive midbass bleed — if present, it is minimal at most. Lower midrange has ample body and weight, straying away from my expectation of ‘lean’ v-shaped vocals — I’m very happy with the note weight and balance of vocals, which is for the most part natural (for the most part… see below). Upper midrange also has a solid sense of clarity and articulation, however once again the 8n’s upper midrange texturing / resolution falls just short of being best-in-class. While the 8n’s vocals do not have the immediate sense of ‘weirdness’ that the 8s gave me, I feel the 8n’s midrange can still occasionally have an artificial sharpness in the top octave of vocals (though to a much, much, MUCH lesser extent than the 8s — perhaps to the point where the typical listener would not even care).

The FLC8n’s treble performance through my preferred configuration (gold nozzle) doesn’t really have any exciting or special properties, but also doesn’t have any major downfalls. There’s a good sense of detail and certainly enough emphasis to inject energy into all genres of music; it sounds fine on almost everything I’ve played through it. In terms of absolute quantity, this setup may cause issues for those highly sensitive to treble, but just barely so. For me personally, there are no overly harsh peaks or sudden dips / voids in the treble. The biggest ‘flaw’ in the (lower) treble likely goes hand-in-hand with the upper midrange’s artificial sharpness, but even that requires some serious focus and concentration to pick out. Apart from that small quirk, the treble with the gold filter demonstrates good high frequency control with once again, ‘decent’ extension. It doesn’t have incredible sparkle or air, but its performance is certainly praiseworthy due to its lack of major flaws.

I generally don’t make any straightforward remarks on soundstage, but the FLC8n seems to be a bit of an oddball here. Soundstage is noticeably large in a vertical sense, and not overly claustrophobic in any direction. Through a bit of listening, I noticed the FLC8n’s vocals can sound sort of as if they are being replicated in a spacious hall, with hazy directional cues. Kind of like an out-of-phase, in-your-head, yet spread-out type of imaging.

The FLC8n has commendable bouts of detail and resolution, but it is not exactly what I would describe as the epitome of natural sound (I’d be hard pressed to find something that represents that at this price range anyway). However, the 8n has another trick up its sleeve. Its custom-tuning sound system does one thing very well that few other IEMs can, which is excel in versatility. This IEM would be a safe buy for the consumer who is not entirely sure what he/she is looking for, other than to enjoy the music. As long as the listener’s preferences do not sit within the rare extremes, the 8n should be flexible enough to not offend anyone. Too much bass? No problem. Treble too piercing? 8n has it covered. In my case, though having tried dozens of mid to high-end IEMs in the past two years, the 8n is still capable of producing a very enjoyable, well-tuned sound signature that puts it above many more expensive pieces.
Pros: + 36 Signatures in one Single IEM
+ Detail levels are great for the price point
+ Clarity is top-noth with the right filters
+ Can also be smooth with the right filters
+ Price is right for the quality
+ Build quality is great, metallic housings and good quality filters and tips
+ Excellent overall ergonomics, great IEM shell shape, no driver flex, no microphonics, good isolation
+ Will satisfy most people out there when it comes to versatility
+ One of the best carrying cases on the market
Cons: - The color won't be for everybody
- The color of the cable won't be for everybody either
- The cable, while great in quality, is a bit springy, but not very tangle-prone
- No options for Balanced cables by default, you need aftermarket cables for that
FLC 8N - The IEM With 36 Signatures!

FLC 8N is a tunable IEM which can have a total of 36 signatures. This is more than any other single IEM we reviewed before, and we're honored to have this kind of potential in our hands. We'll do our best to compare it to other IEMs in this price range (350 USD), and let you know if many signatures can achieve more than a single good signature can at this price point.


FLC Technology is quite a unique IEM producer, which first introduced the concept of one IEM with a large number of signatures, with their FLC 8, released a few years ago. Ever since then, everyone who used it was quite astonished at the raw possibility that one had, and always looked forward to an upgrade, even more to something improved. Sadly, I never had the original FLC 8, so I won't be able to compare FLC 8 to FLC8N directly, but at Audiophile Heaven, we have a large number of IEMs, including many in this price range, or priced that are close, with FLC 8N having a lot to stand against like FiiO FH5, iBasso IT04, and Final Audio E5000. There's also Sennheiser IE80, which is also tunable, and this time we're including it in our comparison list, as its price is also close to FLC 8N and we know we got quite a few questions about the two.

It should be noted that I have absolutely no affiliation with FLC Technology or MusicTeck, I am not receiving any incentive for this review or to sweeten things out. This review is not sponsored nor has been paid for by FLC Technology or MusicTeck or anyone else. I'd like to thank FLC MusicTeck for providing the sample for this review. The sample was provided along with MusicTeck's request for an honest and unbiased review. This review will be as objective as it is humanly possible, and it reflects my personal experience with FLC Technology FLC 8N. Every opinion expressed is mine and I stand by it, the purpose of this review is to help those interested in FLC 8N find their next music companion.


Purchase Link: https://shop.musicteck.com/products/flc8n-the-latest-version-of-flc8

About me



First things first, let's get the packaging out of the way:

Finally, here's a package I am both puzzled and curious to open. This is because for a IEM, the package is quite large, and it doesn't open quite forward, you have to figure out how to open it. I love it when a company takes a step forward in this direction, because it can make the first experience with their product so much more interesting, probably reminding me how interesting and fun that winter, ten years ago, when the fires of youth and my passion for music burned in me so bright that I bought Sennheiser IE80, and what the rush it was to unpack that metallic box, and how interesting that first listening to the audiophile IEMs of that time was.

FLC 8N comes in a cardboard box, but which is layered in compartiments, the first compartiment being above and including the IEMs, the cables, and a tweezer tool for taking the filters in and out, and for modding the sound.

The second compartiment, found below, and accessible by sliding the above drawing in a circular motion, has the carrying case, and a blue thingy that looks like a whistle, which includes all the extra filters and accessories for tuning FLC 8N. This said filter keeper accessory is made of metal, and the carrying case wins hands-down our award for the best carrying case we found with a IEM so far. It is incredibly thick, made of metal, and padded with a soft material on the inside, providing what can be considered the best carrying case out there at this moment.

Inside that carrying case you can find the tip collection, which is good, but doesn't include Spinfit nor foams, a cleaning tool, a 6.3mm adapter, a shirt clip, and another collection of filters.

In all honesty, FLC 8N reaches golden levels in terms of unboxing experience and package contents, and it doesn't miss to reach any spot for its price point, rather setting a standard for what other companies should include with a IEM priced 350USD and above.

What to look in when purchasing a high-end In-Ear Monitor


Technical Specifications

Driver: 8.6mm Dynamic Driver + 2 Balanced Armature
Sensitivity: 107dB / mW, 1000Hz
Frequency response range: 20-20KHz
Impedance: 11 Ohm
Cable Length: 1.2M
Plug: 3.5mm Audio
Pin: 0.78mm
Shell: Metal

Build Quality/Aesthetics/Fit/Comfort

We were able to tell for sure that FLC 8N is a IEM that makes no compromise in terms of packaging and in terms of what is included in its package, but it is time to see what its build quality and comfort is like.

Starting with the build quality, it is quite good. The IEM shells are made of metal, and painted blue, and they are attached to a blue cable, by a 2-Pin connector. The cable is really tightly attached to the IEM body, so you need quite a bit of force to remove it, thing which I consider cool, because you don't have to worry about the connectors of the cables getting loose.

The IEM has lots of vents, about 3 on the inner part, and one, with a filter, on the outside. This makes it extremely vented, and this also makes it a IEM that will get no driver flex, a really important characteristic for comfort in my book.

The cable is intriguing, nothing too spectacular in terms of aesthetics, but on the inside it is a really awesome 99,9% purity 7N Single Crystal Copper cable, with a jacket, and with no solder joints, only with a smooth transition from 4 wires to two at the Y-Split. This ensures the user that they really don't need to upgrade the able any time soon, the only downside I was able to find to it being the aesthetic, which in blue, really may not be for everybody. I don't mind it, personally, and I love the fact it is not tangle-prone, but I can't say blue is as universal as a black would have been as a color.

The IEM shells colored in blue are refreshing, I like what I'm seeing with that glossy surface and that smooth, curved design, being taken from a sci-fi movie, and being worked carefully without any hard edges or missed details. Everything feels high-end and the IEMs look cool and snazzy.

The comfort is just as awesome, the IEMs having no hard edges, the cables are not microphonic, and they have no driver flex, meaning you can use them for running, jogging and any other activity you see fit, with the mention that you need to be paying attention to your surroundings while wearing in-ears.

Sound Quality

We need to address the elephant in the room before we continue with the sound quality, which is its configurability. It is humanly impossible, or at least not really feasible to describe every of the 36 sonic combinations possible that you can get with FLC 8N, so I'll be focusing on the main sonic performance, which is the one they come with out-of-the-factory, and how each changes in the filters affects the sound.

Let's begin with the factory default. This is the Gunmetal + Grey + Gold configuration, the one FLC 8N comes with installed. I notice a rather warm, balanced, smooth and clear sound in this configuration, with a rather relaxed and smooth top end that has a friendly smooth but present sparkle.

The bass tends to be on the slightly enhanced, with the mid-bass and the sub-bass being equally balanced and both being present. In music like death metal, you can hear the low end bass notes and double pedals hit, with good impact and speed. The lower midrange is slightly lower in amount than the bass, leading to the male vocals being slightly light, which works well with all the music I have in my collection, as the rest of the midrange is present enough to give music a good amount of presence and forwardness, without a fatiguing texture.

The treble tends to follow suit with the midrange, and it is also slightly on the smoother side, although there is a little peak in the lower midrange, it is not enhanced enough to make the signature truly v-shaped. The upper treble tends to roll down a bit, although it doesn't get out of the picture, rather being present enough to give music a good sense of air and space between the instruments, so everything's not choked down together.

The detail levels are great for 350 USD, but you can tell that it doesn't try to be more detailed, like a 700 USD IEM would, as FLC 8N doesn't have any upper midrange / treble emphasis. Rather, it keeps detail levels better than most 350 USD IEMs of a few years ago, like IE80, while adding a similarly large soundstage, and bringing more balance to the overall sound.

The signature goes both to warmer and bassier with bassier filters, as well as to lighter and more airy (exposing more detail) sound, with the lighter filters, being possible to create both a more V-Shaped signature, as well as a more midrange-forward signature if you'd want to, meaning that it is basically a IEM with endless possibilities.


While I never heard the original FLC 8, it is clear that the FLC 8N has a large soundstage, with a good instrument separation. In fact, it is clear that FLC 8N has an even larger soundstage, or at least as large as, the old king of soundstage in this price range, Sennheiser IE80, but this time adding more instrument separation and layering, being ridiculously good when it comes to presenting a huge stage, but without making it fake or dispersed, rather keeping things in a wide, yet organized way.


The ADSR and PRaT (Texturization) is really dependent on the combo you are using, each filter combination resulting in a slightly different note decay, together with the tonal balance changes. With the default combo, the bass, midrange and the treble are natural to slightly quick for the bass, natural for the midrange, and natural to slightly slow for the treble, leading to a non-grainy experience, but with enough texture for electric guitars in metallica songs to sound realistic, and with enough smoothness in the treble for electronic music to be sparkly, but not grainy.

Tuning Mechanism

Basically, there are 3 parts that you can tune. The inside of the IEM, which is a small rubber part, and which tunes the sub-bass, the longer tube on the outside of the IEM, which tunes the bass, and the screw-able metallic nozzle which can tune the midrange and the treble. This makes a lot of sense, since the bass resonance is given by the acoustic room inside the IEM, while the midrange and the treble are based on BA drivers, and a filter in the nozzle would filter them better.

Although I haven't been able to write what each of them does, I managed to compile a little list of what the most popular signatures will be

Warm - Balanced (Default): Gunmetal + Grey + Gold - The original tuning as described in the Sound Quality.

Neutral - Balanced: Gunmetal + White + Gold, Transparent + Grey + Gold - This takes off some of that warmth, leads to a more neutral bass, and to a more forward midrange and more forward treble. Really good at revealing details.

Mid - Forward: Transparent + White + Gold - This one takes some of the treble and the bass away, leading to a more forward midrange.

Treble - Happy: Gunmetal + White + Green, Transparent + White +Green - This is quite treble-happy, and pretty detailed. It doesn't sound harsh even in this combo, and it manages to bring quite a bit of sparkle to the sound, being quite the ideal one for acoustic music lovers, and those who prefer a lighter overall sound.

V/U Shaped: Red + Grey + Green, Red + Black + Green - This one is one of my favorites, as I tend to listen to a lot of rock and metal, works really well with those two types.

Balanced + Bassy: Red + Black + Gold, Red + Grey + Gold - When you want to indulge in some hip-hop, electronic and drumbeats and some sweet bass, but you still want some of that midrange and treble to be present to keep things interesting. Also a signature that works well with rock and metal.

Dark + Bassy: Red + Black + Gold, Red + Black + Gunmetal - This one gets pretty dark and works well with bass-heavy and bass-driven music, or for those who really have a love for bass.

Warm + Thick: Gunmetal + Black + Gold, Transparent + Black + Gold - This one is fun and interesting, although it doesn't have a lot of sparkle. When you really want your music to be thick and relaxing, with a pretty strong bass.

Portable Usage

The portable usage is excellent.

As I said, the IEMs themselves are pretty lightweight, they have no driver flex, they are comfortable, sit well in the ears, and are made to be rather ergonomic.

The cables have no microphonic noise when you're running or walking, and FLC 8N is driveable from almost any portable source, like a typical smartphone, at least in terms of volume, although it does sound better if driven from a more potent source, like a more high-end DAP, or an iFi xDSD for example.

There are no noticeable issues when using FLC 8N portably, and I could even recommend those to a performing musician, and although their isolation is not the best, it is enough to shut off all the noise from the city, and to let you enjoy your music, even if you listen at moderate volumes.


The main competitors in this price range are Sennheiser IE80, FiiO FH5, Final Audio E5000, and iBasso IT04.

FLC 8N vs Sennheiser IE80 - Now, this one, many of you asked about and were wondering about, and since their prices are quite similar, I think it is fair to compare the two. Starting with the package, both IEMs come with a good amount of extras, both have a good selection of tips included in the package, but the better carrying case, and the better tuning accessory selection of FLC 8N makes it the winner here. When it comes to the build quality, FLC 8N is built from metal, while IE80 is still mostly a plastic IEM. I prefer the cables of Ie8 simply because they are simpler, and look better to me, but I am not sure if their quality is better than those of FLC 8N, and wouldn't bet on it. The comfort is quite good with both IEMs, but IE80 has a larger bore, and a shallow fit, so it can become uncomfortable quicker, and it has a really open nature, so it tends to slide out of one's ears quickly, compared to a more deeper fit for FLC 8N, and compared to the more ergonomic overall design of FLC 8N. On sound, IE80 has a knob from which you tune how open its vent is, so basically, you can tune its sub-bass, its bass, and how open the soundstage gets. On the lowest setting, it is already borderline too warm and bassy, and IE80 is clearly a fun IEM that doesn't try to be especially accurate or honest, but it tries to be fun and engaging, which it does fairly well. Now FLC 8N can sound in many ways, so many more ways, that based on versatility alone, it is totally easier to recommend to a wider variety of listeners, and while IE80 can sound fun and colored, regardless of its tuning setting, FLC 8N can go from a really warm, thick and lush IEM, to a really bright and thin one, with everything in between possible, so regardless of your taste, FLC has got you covered. In terms of soundstage size, Ie80 was considered the king of midrange IEMs in terms of soundstage size alone for many years now, but its huge soundstage was always a little vague without a lot of instrument separation, again being a fun tuned IEM. FLC 8N has much more instrument separation, with a much better overall definition of each instrument and with the soundstage being the same size, but better defined. The clarity and detail are similar between the two, although the textures and impulse response is quicker on FLC 8N. Now, there are still reasons to go for IE80, like, for example, if you like a really fun and easy going signature, with a lot of thickness, and with Sennheiser's support behind. If you prefer versatility, and detail, though, FLC 8N has got you covered, and should be able to satisfy quite well for the price asked of it.

FLC 8N vs Final Audio E5000 - I feel we should skip the box part, both are great here, and both have great carrying cases included. The comfort is quite a bit different, and here E5000 proves to be more versatile, as it offers both straight-down and over-the-ear wearing styles. E5000 has way more sound leakage, but both isolate well from the outside noise. E5000 is considerably harder to drive than FLC 8N. Now, the sound, E5000 is a one-of-a-kind IEM with one of the thickest sounds out there, with a naturalness and force behind each musical note that makes it truly come alive. From its versatile function, FLC 8N doesn't really go quite that thick and powerful, although, in its defense, it can do a considerably larger number of total signatures and it is a more versatile IEM. I was able to enjoy metal, even some of the more aggressive bands, using both IEMs, and I've been able to listen to jazz and smooth music using both, so both are fairly versatile in their own way. Now, if you really are one to love lush and thickness, E5000 never fails in those ways, but if you prefer a more balanced, and tunable sound, FLC8N has you covered with signatures from A to Z, except the most very extremes, like the ones E5000 manages to reach.

FLC 8N vs FiiO FH5 - FiiO FH5 manages to have at least as a good of a package, and overall build quality + comfort when compared to FLC 8N, and if there's one thing that it does better than FLC 8N, that is to portray an intimate soundstage, as FLC 8N mostly has an expansive soundstage, and although it can get a similar tuning when compared to FH5, if you like being closer to the music, and if you prefer sitting in the same room as the band, then FH5 may satisfy you better. Otherwise, FLC8N will have a wider soundstage, and similar amounts of detail as FH5, although at times, FH5 may overtake FLC 8N when it comes to rendering certain textures and to bringing certain details forward, but as I mentioned earlier in the Sound Quality, FLC 8N doesn't try to be the most detailed out there, but still manages to have a detail level that is more than adequate.

FLC 8N vs iBasso IT04 - iBasso IT04 is quite a unique one, with a really neutral sound, with a really quick and light bass that can keep the pace with the quickest of metals and industrial electronic music styles out there, and which can do a lot that is right in a lot of ways you probably don't expect it to. IT04 is characterized by a more smooth midrange that doesn't feel aggressive, and which lets you lean in the music, and by a bright and sparkly top end that adds a fun and interesting topping that you'll always find welcome if you like airy and crystalline sounds. Now, FLC 8N, with its wide array of combinations possible, will manage to sound a little close to IT04 in terms of overall tuning, but it will not be exactly the same, as IT04 will always have a faster / quicker bass, and a slower / smoother mid range, resulting in slightly different portrayal of music than FLC 8N. Now, both are great, and IT04 has a bit more detail both in the bass, and the treble, but the midrange texture reproduction is actually quite similar between the two, and FLC 8N, although costing quite a bit less than IT04, is able to stand its ground nicely in terms of detail, resolution, and versatility.

Recommended Pairings

FLC 8N is easy to pair with portable sources, and doesn't require a lot of power, actually being easily drive-able from most portable sources, but it will appreciate a higher-end DAP or source when it comes to the resolution and detail level it is able to produce. It is slightly sensitive to hiss, so really hissy sources may have some hiss with it, but this shouldn't be an issue for most pairings.

FLC 8N + iFi xDSD - xDSD from iFi is a great DAC/AMP to pair FLC 8N with, especially if you rely a lot on streaming services, and if you prefer your smartphone to be the main transport for your music. The sound is also tunable with xDSD, since it has an x-Bass and a 3D setting, multiplying the already ridiculous 36 possible tunings of FLC 8N by an additional 4, resulting in a total of 144 total combinations possible for your ears, although in all fairness, it doesn't work exactly like this. But still xDSD's additional tunings are welcome, both being quite good at what they do, and it is a solid overall device, with a nice battery life, good aesthetics, and a clean overall operation.

FLC 8N + iBasso DX120 - iBasso DX120 is a really nice budget DAP from iBasso, one that is very serious about its position in the market, by having an aggressively affordable price, two microSD slots, and one of the best firmwares found on a DAP at this low price. The best part is that its sound is as good as everything else about it, as it has a really clear and articulate signature, which is fairly neutral, so it doesn't change the default signature of FLC 8N quite that much towards any direction, letting the tuning mechanism of FLC 8N do its job.

FLC 8N + FiiO M9 - FiiO M9 is another great, affordable, option to pair your FLC 8N with, and it is one-of-a-kind IEM with a clear and detailed signature, and with a really strong software support from the always-improving Chinese producer FiiO. One thing you may really appreciate with this one is the aggressive design, which makes M9 quite lovely to hold in hand, and which makes handling quite a unique and snazzy experience.

Value and Conclusion

Now, FLC 8N is not cheap by any means, sitting at the higher end of the "midrange" zone, priced at 350 USD from MusicTeck. As always, MusicTeck is a pleasure to work with, and they are champs in providing some of the best service, advice, and exceptional deals to their customers. They usually are the first to have new models from new products in store, and they are always there to serve you with a smile, even if you're ordering from a different state, making sure you receive your package quickly and in the best condition. In fact, I am always amazed when I receive a package from them, by the level of care they place in properly labeling everything, and in making sure the package arrives safely, making MusicTeck one of the shops I recommend the most for USA-based, and not only, customers.

FLC8N is a well build IEM, and while the blue color of the IEM shell may not be for everybody, and while the blue cable may also not be for everybody, the sweet ergonomics surely will make it fit with everybody's ears, and they will make FLC 8N simply slide in and stay there.

The highlight of FLC 8N is their tuning mechanism, which allows for 36 possible tunings, and this is not even considering aftermarket cables or tips, which would multiply that 36 by 3 if you're considering the normal tips, Spinfit tips, and Comply Foams, with even more possibilities down the road if you're considering cable upgrades.

Now, the package content is excellent. This is one of the better packages in this price range, and FLC 8N has the thickest, most hardcore carrying case I've seen to date, better than most IEMs in this price range have. In fact, the tuning mechanism alone makes for more tech and detail than most imply with their IEM, but then again, we're talking about an audio product, so we're not going to care about how nerdy or advanced this all sounds, but about how much impact it has on the sound, and in what direction.

Starting with the sub-bass, it has many colors and many tunings possible, but it is always a natural to slightly fast bass, which can keep up with anything, from speed metal, to Jazz, to deathcore, all the way to electronic and aggressive experimental electronicore music, being a bass that you'll love with almost any style you'll want to listen through FLC 8N.

The midrange is sweet and detail, and it can go in between many configurations of taste, the thing that tends to stay the same being the speed, or rather its impulse response, which tends to be natural at most of times, resulting in a generally pleasing experience, with a good amount of detail and clarity, but without feeling aggressive, or too much in your face.

The treble can go from really smooth and rolled off, to really sparkly and engaging, which is also great, if you want a versatile IEM, and it is generally natural to slow in its speed, so it tends to be rather smooth and silky, even when it is bright, never bothering you with a grainy or harsh presence.

The soundstage is another important aspect of FLC 8N, and I can't finish this review, nor do I want to, without making a big deal out of this. At some point in my life, I was a teenager, looking for music that sounded epic, large, music to extend in every direction my mind could imagine, and believe me, my teenage mind would dream in lots of directions, and at that moment IE8 from Sennheiser really impressed me. In the same way, FLC 8N impresses me now with its soundstage, and I am finding it wide, but with a really great instrument separation, and with a pinpoint precision, this time being quite impressive in every way you can imagine the soundstage of a mid range priced IEM could be.

At the end of the day, if you're looking for music, FLC 8N is here to answer your calls. Especially if you don't know exactly what is your favorite signature, or if you want to experiment, learn more about yourself, and if you like to tweak and play, FLC 8N has 36 signatures you can explore, and even more if you'll indulge in tip rolling and cable rolling, making it the most configurable IEM I reviewed to date, and a really great one at that, being not just configurable, but offering a fun and detailed sound in every configuration, not just a large number of average signatures, but a large number of pretty good signatures, especially for its friendly price. Don't forget to get yours from MusicTeck for one of the best services in USA, and don't forget to follow Audiophile Heaven on Twitter, Facebook, and now Youtube, for more news, in-depth reviews, and fun.

Purchase Link: https://shop.musicteck.com/products/flc8n-the-latest-version-of-flc8

Playlist used for this review

While we listened to considerably more songs than those named in this playlist, those are excellent for identifying certain aspects of the sound, like PRaT, Texturization, Detail, Resolution, Dynamics, Impact, and overall tonality. We recommend trying most of the songs from this playlist, especially if you're searching for new most, most of them being rather catchy.

Bats - Gamma Ray Burst: Second Date
Eskimo Callboy - Frances
Incubus - Summer Romance
Elecric Six - Dager! High Voltage
Kishida Cult - High School Of The Dead
Dimmu Borgir - Dimmu Borgir

Breaking Benjamin - I Will Not Bow
Manafest - Impossible
Thouand Foot Krutch - The Flame In All Of Us
Gorillaz - Feel Good Inc.
Infected Mushroom - Song Pong
Doctor P - Bulletproof
Maximum The Hormone - Rock n Roll Chainsaw
Rob Zombie - Werewolf, Baby!
SOAD - Chop Suey
Ken Ashcorp - Absolute Territory
Machinae Supremacy - Need For Steve
Ozzy Osbourne - I Don't Wanna Stop
Crow'sclaw - Loudness War
Eminem - Rap God
Stromae - Humain À L'eau
Justin Timberlake - Sexy Back
Metallica - Fuel
Veil Of Maya - Unbreakable
Masa Works - Golden Japang
REOL - Luvoratorrrrry

Korn - Word Up!
Papa Roach - ... To be Loved
Fever The Ghost - Source
Fall Out Boy - Immortals
Green Day - Know The Enemy
Mindless Self Indulgence - London Bridge
A static Lullaby - Toxic
Royal Republic - Tommy Gun
Astronautalis - The River, The Woods
Skillet - What I Believe

I hope my review is helpful to you!

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Audiophile Heaven Link: https://audiophile-heaven.blogspot.com/2018/11/King-Of-Versatility.html
Excellent review my friend. Having as a priority the soundstage and the level of detail, which should I choose between e5000 and flc8n?
Dobrescu George
Dobrescu George
@Usuarionow - Thank you for your kind words! If the soundstage size and details are the most important aspects, FLC8N has a larger overall stage, and more detail. E5000 is much more lush and thick, but in a smaller sonic scape :)
Pros: Spacious and Airy Soundstage, Warm and Forgiving, Highly Customizable Tuning
Cons: No filter option to make the sound Aggressive, Build and Finish Could be Better
I would like to thank FLC Technologies and MusicTeck for providing the FLC 8N IEM for the review. This review was originally posted on Twister6.com back in August.

Tuning Systems on IEMs have existed for many years (AKG K3003, RHA T20, Dunu IEMs, Sennheiser IE80, ES Velvet etc) and is implemented in many ways. But not a single IEM came even close to FLC 8S’ 36 possible tuning options when it was released in 2015. Although, I would argue that some of the combinations wouldn’t be practical or applicable for real time use, it takes a brilliant mind (Forrest Wei) to come up with such a sophisticated tuning system. But the tuning system was only part of the reason for 8S’ success. It was its inherent sound quality and performance that contributed to IEM’s success for the most part. And with the customizable tuning options on top of that, one were able to get close to their preferred signature. Leaving the sound aspect aside, there were a couple of quibbles about the FLC’s hardware. For some people, the shape did not provide a perfectly comfortable fit. And the cable was simply too finicky and microphonic.

After 3 years of working on a successor, FLC recently launched an update to the 8S called the FLC 8N. The 8N follows along the same concept of the 8S which is, 36 different tuning options achieved through mixing and matching 10 pairs of swappable filters on the body of the IEM. The external shape of the IEM has gone through a complete redesign and the cable seems to have gone through some changes too. While I won’t be able to comment on the nature of the changes and the differences between the 8N and the 8S, what I can do is, offer my objective + subjective view on the 8N and how it performs for a $360 IEM. Let’s find out.


Leaving the IEM+Cable aside, what you get in the box are the usual suspects; a case, cleaning tool, shirt clip and a few pairs of ear tips, plus the tuning system. The round metal case is hard and feels like it could even take a bullet and still survive. But for my personal use, this is a bit of a cumbersome case due to its weight. But I have seen some people on the forum preferring such cases. As for the ear tips, you get a total of 8 pairs. 4 pairs of white tips and 4 more pairs of black tips of sizes; XS, S, M and L.

As for items that make up the tuning system; you get a total of 10 pairs of filters. These filters are housed in a compact metal canister that looks like a lip-balm stick. You also get a small tweezer that helps to change the Ultra-Low-Frequency (ULF) filters and Low-Frequency (Filters). You also get a spare filter for each of the rubber ULF and LF filters, just in case you lose one of these (yes, you can easily lose the ULF and LF filters if you are not careful). A manual that gives you an index of the filters and other basic information about the IEM is also included.


Looks, Build, Comfort, Isolation and Cable:
I am not a fan of the electric-blue color of the IEM. I personally would have preferred a more neutral color like grey, black or silver. But the build feels sturdy and the finish seems decent. The finish may not be perfect like what you’d see on Sennheisers, but nothing to complain here. As the IEM is light, small in size and is contoured with smooth curves, it is super comfortable to wear. The isolation is not top notch, but when music is playing, it is pretty good. Just don’t expect custom IEM level of isolation.

The cable is again a dark blue color to accent the vivid blue shell of the IEM. It is a bit springy and feels a little plasticky. But other than that, from a functional perspective, it is a very good cable. Meaning, it doesn’t tangle that easily and is not microphonic (at least when worn over ear). So it does look like FLC has made some improvements. As to what kind of sockets the IEM uses, I was neither able to confirm nor deny as I thought it was best left untouched.

For sound impressions, I would like to begin with the default configuration, which is; Gunmetal + Grey + Gold (Med ULF + Med LF + Most MF & Med HF). In this configuration, the sound of the 8N is warm, balanced and smooth. This results in a relaxed and fatigue-free listening experience. The bass is slightly enhanced and has a gradual downward slope into the center mid-range. The result is a warm and well integrated bass into the mid-range that provides warmth and body without creating a veil. Sub-bass and mid-bass balance each other out well that, there is satisfactory level of impact, as well as warmth/body without one over powering the other. Also, as the 8N uses DD for the low-end, you get the nice natural decay.

Although, the Gold filter is the one that offers most MF, the mid-range is actually a touch relaxed. The mid-range is sufficiently bodied and is slightly warm in tone, as the upper-mids are slightly smoothed down. If you are someone who finds the 15dB rise in the 3kHz on headphones/IEMs a bit shouty or harsh, you will feel right at home on the 8N, because this bump is rather polite on the 8N. But it is sufficient in amplitude to provide overtone reach and solidity for the vocals, while keeping them rounded and smooth. But for these reasons, the transparency in the mid-range, although good enough, is not of high class. While I would say the mid-range is slightly laid-back their positioning is not backward. So they offer good presence, but just subtly polite without causing any aggressiveness.

The treble follows along the same line as the mid-range and stays smooth with a gentle peak in the lower treble, which is followed by a toned down upper treble. The lower treble makes it up by providing sufficient articulation to the notes and maintaining the balance in the signature. The downside of the upper treble being toned down is, the resolution is not very high and you won’t get the feeling of finesse you experience on high end IEMs. As the resolution and transparency are not of the highest order, this is not an IEM geared towards detail retrieval. But what you get in return is a smooth, laid-back sound that is very forgiving of poorly recorded material.

FLC claims that one of the areas of improvement on the 8N, over the 8s is the soundstage. Although I cannot comment on whether it is an improvement or not, all I can say is that the soundstage on the 8N is spectacular. It is not just very spacious, but also open and airy, almost approaching CA Andromeda level soundstage. This just might have dethroned the IE80 from the sub $400 category soundstage-king position. The stage has sufficient depth to an extent it doesn’t sound flat. With the help of the soundstage, the instrument separation is really excellent on the lateral plane, although layering may not be its forte. The whole presentation of the IEM just keeps you immersed in the music.

Tuning System:
FLC 8N has a 3 point tuning system. What that means is, you can tune 3 distinct frequency ranges of the IEM at the same time. This is achieved though swappable tuning filters. You get; 3 x Ultra Low Frequency filters (ULF), 3 x Low Frequency filters (LF) and 4 x Mid Frequency & High Frequency filters (MF & HF). The port for the ULF is located on the inner side of the IEM that faces your ear. The port for the LF filters is on the faceplate of the IEM shell. The MF & HF filters are screwed in at the nozzle of the IEM.


Ultra-Low Frequency and Low Frequency Filters (ULF & LF):
ULF – ULF filters are the ones those look like a rivet and are made of plastic. These filters primarily affect the lower bass and the sub-bass region, which are all frequencies below the 100Hz. This filter determines the sub-bass extension, power, rumble and weight of the impact. You get 3 pairs of filters: 1) Red = Most ULF, 2) Gunmetal = Med ULF and 3) White = Min ULF.

LF – LF filters are the ones made of rubber with a small flange on one end. These filters primarily affect the mid-bass, upper-bass and lower-mid regions, which are frequencies between 100Hz to 700Hz. These filters determine the warmth, weight and body of the notes in the lower mids. You get 3 LF filters, but the color codes are different. 1) Black = Most LF, 2) Grey = Med LF and 3) Transparent = Low LF.

When it comes to ULF and LF filters, these need to be analyzed in combo rather than individually. This is because they go hand in hand and the result they produce are relative to each other.

Red + Black (Most ULF + Most LF)
This is the bassiest combo and meant for bass lovers. You get great sub-bass extension, lots of sub-bass power, rumble and impact. The bass starts to bleed a little into the mids and starts to tighten the stage that the instrument separation is not the best. Bass takes a dark tone and the pace of the IEM is slowest on this combo.

Gunmetal + Black (Med ULF + Most LF)
This combo is more like a more controlled version of the above one. There is adequate sub-bass power and impact supporting the warm and thick upper-bass and lower-mids. This is not the cleanest sounding combo, but works well if you want to unleash male vocals.

Transparent + Black (Less ULF + Most LF)
This combo creates a bump in the upper-bass region and makes the IEM to sound thick and syrupy. This creates a veil over the mid-range. Not the best combo, unless an upper-bass bump is exactly what you are looking for.

Red + Grey (Most ULF + Med LF)
This combo has a slightly enhanced bass response, but with strong bass impact and power. Sub-bass kind of steals the attention with the bass impact and power. This combo actually quite nice for electronic music when paired with the Green MF&HF filter as it creates a nice U shaped sound.

Gunmetal + Grey (Med ULF + Med LF)
This is the default combo. This combo gives a slightly enhanced bass that is slightly warm and full-bodied with good sub-bass extension. Sub-bass and mid-bass don’t fight for attention and so there is a nice balance in low end of the spectrum. This is a very versatile combo that would work for all genres. It just won’t give you any extreme effect.

Transparent + Grey (Less ULF + Med LF)
This is another good combo that works well for male vocals as it is warm and the sub-bass is rolled off and the impact and rumbles take a back seat. The notes are not too warm and thick, so you don’t have the congestion and veiling problem like the Transparent+Black combo.

Red + White (Most ULF + Less LF)
With the White LF filter, bass becomes very neutral. But with the Red filter, you still get some nice impact and sub-bass power. This is also another combo that would work well for electronic music if you prefer slightly leaner bass notes.

Gunmetal + White (Med ULF + Less LF)
This is another highly recommended combo. You get a neutral level bass with good the sub-bass extension but without strong impacts and rumble from the sub-bass. What this combo also does is, because the bass is nicely controlled, it lets the mid-range pop out a little more, so that you don’t feel it is too relaxed in the upper-mids, as you would on the Gunmetal+Grey combo. You get nice separation and an airy stage. This is not only the best combo for classical, but is also one of the versatile combos. People preferring some warmth may prefer the Gunmetal+Grey combo over this one. But if you like a neutral, ruler flat bass that goes well into the sub-bass, this is just the combo you need.

Transparent + White (Min ULF + Less ULF)
This is really a bass light combo with the mid-range in the spotlight. Bass lacks body, warmth and weight. But if you like lean bass and want to get a mid-centric signature, this might work.

Mid Frequency & High Frequency Filter:
These are the screw able metal filters. These filters affect the upper-mids, lower-treble and the center-treble, which are frequencies between 1kHz to 10kHz. These don’t have much of an impact on the upper treble, so do not expect to customize the upper-treble per your preference. As I already discussed how the Gold filter sounds in the sound impressions section, let’s see what changes are observed when going from the Gold filter to the other 3 filters. Btw Gold filter is Most MF & Less HF.

Switching from Gold to Green (Less MF & Max HF)
This relaxes the mid-range further, but brings up the treble noticeably. If you want to improve the articulation in the treble or if you are shooting for a bright and airy treble, or if you are trying to get to a U shaped sound, this is the filter you would choose.

Switching from Gold to Gunmetal (Med MF & Med HF)
Compared to the Gold filter, the Gunmetal filter relaxes the mid-range further, while keeping the treble at the same level. This creates an even more laidback sound. Can come in handy if you want a completely forgiving and a too laidback sound.

Switching from Gold to Blue (Less MF & Less HF)
Blue just shelves the mid-range and the treble down even further compared to the Gunmetal. I seriously wonder why this filter even exists. Because even the Gunmetal filter is already relaxed enough. Unless all you want to hear is bass and lower harmonics of an instrument/vocals, I can’t imagine anyone using this filter. Although one could argue it can be used to create a light sound signature when used in combination with Transparent+White filters, you could achieve that with the Gunmetal filter already.

FLC should have made this filter into a Most MF & Most HF filter, as I feel that is what is missing in FLC’s configuration.

Possible Combos for some Popular Signatures:
- Warm and Balanced: Gunmetal + Grey + Gold
- Neutral Balanced: Gunmetal + White + Gold, Transparent + Grey + Gold
- Mid-Centric: Transparent + White + Gold
- Treble-Centric: Gunmetal + White + Green, Transparent + White +Green
- V/U shaped: Red + Grey + Green, Red + Black + Green
- Balanced with Strong Bass: Red + Black + Gold, Red + Grey + Gold
- Dark and Bassy: Red + Black + Gold, Red + Black + Gunmetal
- Warm and Thick: Gunmetal + Black + Gold, Transparent + Black + Gold

FLC_4.jpg FLC_5.jpg


FLC 8N vs IE80S:
IE80S has a U shaped signature as a result of enhanced bass and treble (6kHz peak). In terms of tuning capabilities, it only has a bass tuning knob to adjust the sub bass. There is no way to bring the mid-range forward or reduce its 6kHz treble peak. This makes the IE80S not the best IEM for some genres. For example, the vocals sound recessed and the instruments do not sound accurate nor natural. This is purely a fun tuning.

The 8N on the other hand, because of its highly tunable feature, makes it a more versatile IEM than the IE80S. Even with the Green filter which is Med MF & Most HF, the mid-range is not as recessed as on the IE80S. While neither IEMs qualify to be called as accurate sounding IEM, 8N can get close to sounding accurate and has better transparency than the IE80S.

In terms of resolution, both are almost on the same level. One of the greatest strengths of the IE80S is its soundstage. 8N has a similar level of soundstage. But because the stage is not warmed up by the bass, it sounds more open and airy. This also results in better separation on the 8N. So in terms of sound quality, it is not even a contest. 8N takes the win with a comfortable margin.

In terms of physical features, 8N offers better comfort and more isolation. IE80S on the other hand has better build quality, reliability and a better cable.

FLC 8N (Gunmetal, Grey, Gold) vs Simgot EN700 Pro:
While 8N’s signature in the Gunmetal+Grey+Gold combo can be described as warm, balanced and laidback, 700P’s tuning is more neutral-like with a slightly enhanced bass. The bass response on these 2 IEMs are almost similar in the sense that both have similar level of impact and power. But 700P’s bass is warmer. But the overall bass quality is better on the FLC.

8N goes for a laidback sound with a slightly relaxed mids and treble. Whereas 700P goes for a more accurate sound with better presence in the mid-range, particularly in the upper mids and has a slightly brighter treble. There are no filters for 8N that can reproduce this tuning (because the green filter may help bring the treble up, but it relaxes the mid-range further). Due to these differences, 700P is just more transparent in the mid-range and is less forgiving in the treble.

8N has a more spacious soundstage and better overall resolution. As a result, 8N displays better instrument separation. 8N also has a darker background and a more precise imaging than the 700P. Overall, 8N is a bit laidback and musical in nature that you can play some of the poorly recorded tracks and not be punished. While the 700P does have a slightly enhanced bass to inject some fun aspect into the sound, it is still a more serious tuning. Both are balanced sounding and very versatile IEMs. 8N is laidback, whereas the 700N is engaging.

Source Pairings, Sensitivity and Hiss:
The 8N is not a demanding IEM when it comes to power. It just sings even straight out of a smartphone. Any current generation DAPs should have more than enough juice to drive the FLC sufficiently. When I tried the 8N on the Hugo 2 and the desktop amp, there was a nice jump in performance. But there was a slight hiss. But its hiss performance is well within the acceptable standard. Meaning, while it does hiss with sources that are powerful or have a high noise floor, it is hiss free from most portable sources.

As for tonal synergy, as the IEM is already laidback in character, it is better to stay away from sources that have a laidback or a soft sound. Also best to avoid thin sounding sources as it destroys the character of the 8N making the presentation feel empty.

Critical Comments and Suggestions:
- Replace Less Mid & Less HF filter with a Most Mid + Most LF filter
- Build quality and finish could be slightly better
- A more neutral color for the shell would be nice

The portable audio has seen some accelerated progress over the few years with so many competitors entering the market. With such high competition, in order to survive, let alone succeed, manufacturers have been coming out with really nice products for very competitive prices. So it is not difficult to come across a nice product in the mid-fi segment. But there are some products that stand out from the rest of the competition, as they do things right and offer a little more than that. And FLC 8N is one such gem in the mid-fi realm.

While the signature of the 8N is completely neutral, its signature is not too far from the natural response of a speaker in a room. It is balanced and smooth and is just an easy listen. It may not be the most accurate IEM. But it immerses you in your music with a large stage and a musical signature. You could say, this is the fun sound done right. It may not be suitable for someone looking for accuracy or neutrality. But, if you are in the market for a balanced and smooth sounding IEM in the $500 price range, just get the FLC 8N, choose a filter combo that suits your preference and works for your music and take a break from this hobby.

Purchase Link:
MusicTeck Store: https://shop.musicteck.com/products/flc8n-the-latest-version-of-flc8
Amazon: https://www.amazon.com/Balanced-Arm...1&sr=8-2&keywords=flc8n&tag=3340693-headfi-20