SuperTFZ Force King

General Information


SUPERTFZ FORCE King Tesla Dual Magnetic 2-Way 2pin 0.78mm HiFi Audiophile IEM in-ear Earphone


Ultra-high dynamic performance earphones, ultra-high-definition, no sound coloring, more real

Tesla unit

Graphene diaphragm

Dual magnetic circuits and dual sound cavity


Spatial loud field

Deep sound insulation and noise reduction

Professional stage tuning

Detachable cable

Dual magnetic circuit two-crossover technology

The SUPERTFZ dual-magnet unit has a strong driving force, and the efficiency is significantly improved compared with the ordinary single-magnet dynamic unit. The use of magnetic mechanics is reasonably matched with two high-performance rare earth neodymium magnets, which can reproduce ultra-clear resolution and strong bass at any time.

The drive unit with dual cavities, due to the addition of a tuning rear cavity, is mutually tuned with the front cavity of the unit, and the cavity is larger than that of the ordinary drive unit, which is equivalent to increasing the linear space of the unit. By adjusting the size of the rear cavity and the air permeability coefficient , can significantly improve the mid-frequency response, the sound is smooth, and at the same time reflect a broad and magnificent sound field, there are acoustic guide holes on the back of the drive unit, reasonable control of the guide holes can optimize the movement of the diaphragm, and the frequency response control can effectively improve the transient characteristics of the bass, and accurately Reproduce the rhythm of each frequency point to ensure the true restoration of the scene information.

The unit has an independent ultra-high frequency crossover technology, which is comparable to the resolution of the balanced armature, which can ensure the ultra-high frequency restoration and transient performance of some details of the musical instrument.

Custom on-ear design

FORCE King lightweight to wear, no invasive pain, no burden, comfortable and fun to create.

CNC carved aluminum mirror craftsmanship + crystal glass (natural wood)

Based on the contour shape of the human ear, the lightweight design is light and painless when wearing, providing a longer comfortable experience during your creative process.

Sense of presence, ultra-clear sound

FORCE King built-in dual-magnetic circuit two-way ultra-clear Tesla dynamic, creating an immersive experience of ultra-clear resolution space sound field.

Tesla's big power unit, five consecutive VGP award units

11.4mm super magnetic dynamic unit, N52 strong magnet, with graphene Nano-diaphragm, excellent restoration of various music information, flat frequency response without sound coloration, rich high-definition detail levels, and precise positioning, in your creative recording and contraction, precise calibration during mixing.

UHF frequency division technology

Based on the powerful and extraordinary ultra-high frequency crossover technology, the low resistance is easy to push, and even with a mobile phone, you can easily experience the sound quality of the flagship amp, and the flagship-like experience.

Professional stage tuning

More than 20 band singers and sound engineers participated in in-depth joint tuning to ensure the output of professional-grade real monitor sound and high reproduction without sound coloration, and to provide excellent sound support during live performances and mixing creation and recording.

Frequency response curve

5-40kHz ultra-wide bandwidth, reproducing high-precision and extremely accurate stage sound effects.

Support detachable cable

It supports 2pin 0.78mm detachable cable, which provides greater possibility for the performance improvement of the headset and the later playability.

Light to wear

The single side weighs only 5.8 grams, suitable for long-term unburdened wear, comfortable creation

Model: FORCE King
Driver: 11.4mm dual magnetic circuit dual cavity Tesla magnetic group unit
Impedance: 16Ω
Sensitivity: 113dB
Frequency response: 20-40kHz
Plug: 3.5mm stereo straight plug
Cable: silver-plated cable
Cable length: 1.2m

Silver-plated cable
Silicone eartips
Storage bag

Latest reviews


1000+ Head-Fier
TFZ Copies Itself
Pros: Technical ability of the sound, clarity, transparency and brightness level.
- Remarkable treble level, extension and definition.
- Outstanding bass tuning, with remarkable execution, presentation and power.
Cons: In many respects, it resembles earlier SuperTFZ or TFZ models.
- Overall innovation is low and unattractive.
- It is a demanding specialist profile, which is far from pleasant musicality.
- It is not suitable for long and relaxed listening, on the contrary, it is intense and demanding.
- The set of accessories and packaging is not consistent with the price.
- There is no balanced cable to choose from.

What is it, a man, a bird? No, it's the SuperTFZ logo. Again the question: Is SuperTFZ the evolution of TFZ? Is it really an evolution? Let's see, let's start with the logo. If it is changed, it is for the better. I read a comment from a Head-fi user who said that the logo is a cheap imitation of Jerry Harvey. He's not wrong and from the first time I saw it, I didn't like it. I found the design unattractive. Secondly, the first model I tried, the Force 1, looked the same as the TFZ Essence. But, they also resemble many other IEMS that have this same shape, even in sound. Only the Force 1 is more refined than, for example, the PaiAudio DR2. But it is also more expensive.
Now, this "new model" that is the Force King (not even the name of the brand name is a bit different) also looks like another TFZ, namely the Live 1. They have changed the glitter and the nice logo for a metallic outer face and the man with wings. The only good thing is that instead of the fake diamond-like ball, there is a hole at the apex. Otherwise, the design is very similar. Even the frequency response is very close, as are the specifications. So what is SuperTFZ, an attempt by the brand to bring old models to the market with a bit more refinement, a subtly different look and, on top of that, a bit more expensive? But let's take a closer look to see if this is the case.

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  • Driver Type: 11.4mm double-cavity Tesla magnetic group unit with double magnetic circuit.
  • Frequency Response: 20Hz - 40kHz.
  • Sensitivity: 113dB.
  • Impedance: 16Ω.
  • Jack Connector: 3.5mm SE gold plated.
  • Cartridge Connection Type: 2Pin 0.78mm.
  • Cable: Silver plated cable.
  • Cable length: 1.2m.

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The SuperTFZ Force King costs $129, while the Force 1 costs $79. Both have the same packaging. Only the pictures on the outside are different. If they can put it on autopilot, so can I.
The SuperTFZ Force King comes in a vertical box with a square, black base. Its dimensions are 93x93x148mm. It opens by sliding the cover upwards. The cover is light coloured on the sides and black on the top. On each side there is a different motif, on one side the logo in black on a white background, on others realistic photos of the capsule and, finally, the brand name and the holographic seal of authenticity. The box has a seal to certify its closure. Removing the cover reveals that the box is a parallelepiped with the IEMS resting on its square top. These are embedded in a black plastic tray, under it is another dark cardboard box inside which are the rest of the accessories. In a nutshell:

  • The two SuperTFZ Force King capsules.
  • A black bag with gold-plated brand logo.
  • The 4-strand silver-plated cable with 2Pin 0.78mm connection and 3.5mm SE plug.
  • 1 set of black silicone and narrow core tips, sizes SxMxL.
  • 1 set of black silicone tips with wide core, sizes SxMxL.
  • 1 pair of extra tips already fitted to the IEMS.
  • 1 3.5mm to 6.35mm SE adaptor, gold plated.
  • 1 instruction manual in Chinese and English.

Each set of silicone tips comes in a white pouch.
The packaging is a bit big for the contents, it could be half the size. It's worth noting that it is original, but I would miss a hard case with a zip instead of the pouch. Except for this preference, the contents are just right and while the cable is of quality, it is the same as the previous model. Being a more expensive model, there is only an additional adapter. In other words, no evolution.

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Construction and Design

The Force King has a capsule, the shape of which is classic within other models of the TFZ brand. The outer face is very similar to that of the semi-custom Live1, My Love III, made of transparent polycarbonate, except for the outer plate. The outer face is opaque and silver. In the centre, the brand's logo can be seen, painted in black ink, on the right capsule. On the left capsule, on the edge, the brand name can be read. In the lower corner of this face, there is a hole surrounded by a kind of funnel, which has a red or blue colour, indicating the channel. The mounting of the two-pin connection, which is superficial, is located on the upper edge of the capsule and consists of a transparent rectangular plate with two holes, the connections of which are gold-plated. On the edge next to this plate is inscribed the name of the model and a phrase which I cannot read. On the inner side is the letter identifying the channel. All the inscriptions are in a faint light grey ink. The inscriptions on the inner side, in particular, are difficult to make out. The transparency of the enclosure allows the dynamic driver to be seen. In the centre of the inner side, there is a hole, which coincides with the centre of the driver. The mouthpieces are fully integrated in the capsule, being made of the same material, without any division. They are almost 4mm long. The first, lower part has a diameter of 5.6mm. Then, there is a small flared crown, whose diameter is 6.2mm. Finally, the diameter of the outermost rim is again 5.6mm. Its interior is protected by a perforated metal grille.
The cable is a 4-strand cable with 24 silver-plated wires of 0.05 each and transparent TPU-coated. It has guides on the ear. The sleeve of its connectors is particular, in the case of the 3.5mm connector it is a polished metal parallelepiped with the brand name on one side and two black screws on the other side. The splitter piece is more square, almost cubic and has the logo drawn in black on the main face. There is no adjusting pin and it is missing. The cable is original, but the metal parts feel a bit heavy. There is no choice of plug other than 3.5mm SE.
The cable is the same as the Force1 model, the design, except for the outer side, is the same as the TFZ Live 1.

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Adjustment and Ergonomics

The size and classic appearance of the capsules, with a semi-custom external shape, with a very rounded interior and no edges or corners, provides a superficial fit, quite free of contact with the external parts of the ear. And, if it does exist, the friction is very soft, due to the smoothness of the material used. This means that, as the hours go by, it does not affect the perception of comfort provided by this model. In this way, the ergonomics, widely contrasted in other models of the TFZ brand, is high and quite good. Once fitted, there is hardly any possibility of rotation and, with the right tips, there is no risk of the IEMS becoming detached or falling out.
With my silicone tips, filled with foam, although the fit is quite shallow, the seal is very good and the level of insulation is high.
Model with the same design, the same quality of fit and ergonomics.

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The profile of the SuperTFZ Force King is presented as a W, where the accent is on the sub-bass, although it is superior in the upper-mids and treble. Both the low-mids and the more central part are moderately recessed, something that polarises the sound. In that sense, it seems clear that the technology used (the double magnetic circuit and the two-way frequency divider) has an influence on this particular profile.

Perhaps, to be facile in assessing the sound of this product, which is on the verge of rehashing, would be to lack a critical ear. For starters, I've had enough of this profile. I recently reviewed the TRI i One and find similarities between the two. I can't comment that the sound of both is homogeneous or balanced. Perhaps the most homogeneous part of the set is the treble. But it is a demanding mid-high profile, the lower end of which has been slightly softened. The mids are partially sunken, especially in the initial part and, above all, in the middle. But it is not a bad ensemble. The fact that I don't like its tuning doesn't mean that I don't value other virtues, although it gets complicated the further it moves away from neutrality and/or smoothness.

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As always, TFZ was never bad on bass. On the contrary, I think TFZ models were always revered by their fans in this respect. SuperTFZ should be better, right? At this point, finding quality bass in a dynamic driver of this price is not that difficult anymore. The worst thing would be to get it wrong and that's something that would put the whole thing out of play. Fortunately, that's not the case here. This is not an ultra-emphasised bass profile, not even in sub-bass. It maintains a certain level of power in the LFO range, without being predominant overall. It's true that there is punch, it's not bass neutral, but it's not full-blooded TFZ either. Basically, both the mid-high and treble levels are over the top. And that is something that limits its exposure.
The punch is concrete, concise, it has a speed that could already be called standard in this price range, as the last DDs I've tested are also like this. In this respect, the bass level of the competition is less and less surprising. So the Force Kings fall into that territory, a nimble, relatively fast bass, with a quick decay, a smooth texture, subtly marked, but not too rough or descriptive. The execution is clean, freeing the mids of any taint and possessing the technical quality, resolution and level of definition to follow complex, unfiltered bass lines. It does not saturate with volume and is suitable for dirty bass, as it is able to tolerate and execute it naturally and without suffering. That's all you ask of dynamic bass and this model delivers it. The emphasis on the sub-bass to "save" the first part of the midrange is also welcome.

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For some time now, I have been very critical of tuning like the Force King. Trying some IEMS and detecting a gap in the mids alters my mental recreation of the music as I know it. If this profile is for monitoring, it is only for high-mids and treble, because for the first half of the mids it doesn't work. This is a very clear ensemble of thin male voices, presented at mid-distance, well-defined and transparent, but with a low corporeality, physicality and density. The concave sounding feel is maintained with many styles and songs. It works well for many others. But, in most of the music I listen to, I'm going to miss a more homogeneous and complete presence presentially. And this will cause me to try to turn up the volume to find a fullness that is not there, forcing my ears into an over-presence of mid-highs and highs that will not make me enjoy the music.
The tone possesses a brilliant tendency, without being completely analytical, it is saved by the fact that its point of excitement and level of definition is not totally analytical, although it is postulated as a candidate, it is narrowly missed. And perhaps it is a point of sanity within this escalation that is the transition from the mids to the highs. The Force King persists in this zone and manages to penetrate just enough to flirt with the danger of the hot zone. This is how this model enters that set of IEMS that excite their mid-highs to be considered as a monitor model, losing too much information in the first half of the midrange. Fortunately, it doesn't just focus on definition or detail, but plays 50% with it. Perhaps it is the balance of the central range. But let no one think that this implies neutrality or a natural and pleasant tonal accuracy. On the contrary, they are demanding and present in the most sensitive part of the audible range. All this is to exhibit a forced transparency, level of clarity, resolution, definition and analytical ability, at the cost of moving away from an organic, realistic or natural sound.

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Coming from an excited upper-mid range, the Force King still has the reserves to raise the bar and generate a good initial spark. It's able to camouflage the sibilance among some present treble. It's like hiding something in a pile of stuff, it stands out less. But it has its level of effectiveness. The control decay is slight and the treble is very well extended for a single DD. This is a reward for them, even if it is an add and go. I would perhaps remove a little power from 2kHz onwards and spread it out in the midrange gap or to give it a little more air. Both ends are good, but the midrange disappoints in comparison, because of its unevenness, not its technique. Something that prevails in the treble and also in the bass.

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Soundstage, Separation

The sound is eminently wide, limited in depth, above all, by the thinness of the sound. The scene is open, slightly volatile for the same reason: the notes have little physicality and have a tendency to expand because of their thinness. But there is also an attachment to detail that anchors the notes to these elements. The result is a compendium of both sensations, showing a remarkable level of separation, clarity, transparency and luminosity. But it also maintains a musical rootedness due to the level of resolution and precision of its presentation, which avoids a higher expansion and a more marked three-dimensionality. But all in all, it provides a quite perceptible level of height and a more concise placement.

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Letshuoer D13

With a lower price, better cable, possibility of a balanced plug, better ergonomics, better construction, with two profiles to choose from, thanks to their mouthpieces, the D13 is a superior rival a priori, for all these virtues. But it is also superior in sound. Their low end is very good, with a very descriptive, attractive and exciting roughness and texture. The mids are more dense, corporeal, physical, dense, organic and realistic. The sound is much fuller and more complete in this central area. Moreover, it lacks any demand in the upper-mids. And if there were to be any chinks left, they would be eliminated when switching to the Silver mouthpiece.
The comparative frequency response graph is highly eloquent. It seems that the D13 is controlled where the Force King overshoots: a touch less sub-bass to round out the lower range. The high-mids are much more homogeneous and balanced, and the treble is expressive, natural, realistic and pleasant. Next to it, the SuperTFZ is brighter, hollow, unbalanced and excited. It is more transparent, has a superior treble extension. You could even say it is technically better, but this is only an illusion due to its emphasised profile. The D13 is also a refined and better balanced DD. Extension does not mean better, more explicit detail does not always mean a fully detailed and rich sound. The D13s offer a sound that is richer in nuance, but, above all, more present in all ranges. Something the Force Kings seem to forget in some areas.

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Ending the review of the SuperTFZ Force King is a relief. These IEMS require prepared ears or a low volume level. Admittedly, though, I have been very critical of this model from the beginning. In my opinion, SuperTFZ has only stretched the existing clichés of their previous model and the TFZ stock. They have mixed it up and only gone to great lengths to generate a more refined and precise sound. But this does not imply that it is accurate in its tuning. It is not a balanced, neutral, pleasant and musical model. The sound quality, undoubtedly the best thing about the model, is unquestionable, but its presentation must be taken into account. If you are able to tolerate its mid-highs and treble, at the cost of giving up a mouthful of the first half of the midrange, go for it. This is not unique. Neither then, nor now, are the Force Kings alone. There will even be more emphasised and demanding models. Therein lies a certain restraint in this model, raising the bar so that the peaks don't get too much higher, generating a kind of high plateau. It doesn't play down the music in detail either, but there is more respect for it. And that is also a positive point. But although it is a technical model, it is also unbalanced and inconsistent as a complete, all-round monitoring system.

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Sources Used During the Analysis

  • Aune Flamingo.
  • Earmen Angel.
  • TempoTec Variations V6.
  • Hidizs AP80 PRO-X Red Copper Limited Edition.
  • ACMEE MF02s.
  • xDuoo XD05 BAL.
  • TempoTec Serenade X + iFi Zen Can.

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  • Construction and Design: 80
  • Adjustment/Ergonomics: 80
  • Accessories: 73
  • Bass: 83
  • Mids: 73
  • Treble: 90
  • Separation: 85
  • Soundstage: 85
  • Quality/Price: 80

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Penon Audio Store, offered me this model, in exchange for writing an honest review. I want to make it clear that all my opinions written in this review have not been conditioned by this fact, nor will I ever write anything that I do not really think or feel here. I will only write about my personal opinion in relation to the revised product.

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Purchase Link

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You can read the full review in Spanish here

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Headphoneus Supremus
SuperTFZ Force King monitor dynamics from TFZ
Pros: Univeral comfortable medium familiar shells in 2 pin
Highly resolving 11.4mm graphene dynamic,
Dual magnet with tesla flux means sound is tight can clean.
Highly detailed neutral presentation with bass
Tuning specialized for both stage monitoring and listening to music
Well balanced with moderate bass, upper mids and full trebles.
No perceivable roll off in either ends of its sound presentation.
Very good clarity and highly technical. Good imaging
Takes to amplification like a champ
Easy to drive
Cons: Weak accessories package. Very standard set of cheap silicone tips
One set of very flimsy tips, practically useless.
Included cable does not do the Force King any justice.
Universal housing that is all too familiar
Shells are fingerprint magnets.
slightly below average passive isolation.
Needs aftermarket tips and cables for its true sound qualities
Average build quality.
SuperTFZ Force King

TFZ has been producing dynamic IEMs since 2015, recently has changed up their name to SuperTFZ for their newer offerings. My prior experience with the new SuperTFZ line of IEMS was the Force 1. Which you can read about here. In this review we are taking a good look into yet another new release from the group called the Force King. It will be referred to as the FK here for Force King from this point forward. It seems that TFZ clearly likes to use dynamics for their designs as most of their IEMs are dynamics. The FK utilizes a large 11.4mm graphene diaphragm, dual magnets with a tesla flux in an all too familiar housing. I say familiar because I have seen this exact housing used on a whole bunch of Chi fi manufactured IEMs. So not all that original in looks and its build, but ultimately what matters here is the sound.

I am new to the TFZ earphones. It is all new to me anyway since I have never heard any of their prior TFZ earphones. Then I was introduced to the Force 1 which opened my eyes and ears to what these guys can do with the tried-and-true dynamic design. The Force King is a newer release from the group that supposedly is a one up on the Force 1. It has to be, cus they are charging an extra $50 spot for the admission to get a Force King IEM. I would say it is more differently tuned than similar. Force 1 is a balanced V shaped Fr. To my ears the FK here is more of a neutral slightly brighter tuning with some moderate bass emphasis. The FK was made for monitoring vocals and instruments.

Which is a bit surprising as there are not too many IEMs dedicated for monitoring purposes but upon reading the description of the FK and finally being able to listen to them. Yes, these were made for monitoring music. Just because an earphone was purposefully made to monitor vocals and instruments does not mean they are going to be not so good for music listening. Arguably, one of the best bang for buck Cans I own is the Beyer DT1990pro which happens to be a monitor can.

Disclaimers: The SuperTFZ Force King was provided by Penon audio for the purpose of a review. If you feel the need to get yourself a set. You can look up their sales page on Penon audio website here. The FK was burned in for a period of a week's time and are now ready for evaluation using my sources. IBasso DX300Max, Fiio M15, BTR7, Shanling M6 pro, M5s, IFI Gryphon, IFI DSD Signature. Fiio K3 2021 edition.

As mentioned earlier The Force King is priced a bit more than the Force 1. With a price increase my expectation for this set has also increased. To me the Force 1 was and still is criminally underrated and overlooked dynamic based IEM. It seems to me TFZ earphones have somewhat of a negative reputation among the prior owners of the brand's offerings. Too many of the same type of IEMs with not enough distinction among the various offerings will do that. I remember back when TFZ was releasing one IEM after another. There were almost too many and all with a very similar design. I had a difficult time figuring out which TFZ IEM was what.

Here comes yet another release of another dynamic made by TFZ called SuperTFZ Force King? So what does that mean exactly? To be honest all I care about is if the price of the IEM holds its value, regardless of a manufacturer's history. With the ever-increasing competition among Chi Fi manufacturers, it is even more important now than ever to bring out a compelling product. Earphones under the $100 mark are all considered budget so when they go over that price point it has to mean the sound will have to be upgraded from the various $100 and lower IEMs. It has to compete with other offerings in the price range or better yet do one better.
The Force King is marketed as a monitor for stage and is tuned using a highly resolving 11.4mm graphene dynamic. The sound difference between this set and their first offering being the Force 1 was clearly evident. The definition of the sound was on a different level. The overall sound had much less coloring to its tuning, letting instruments and vocals come out with much clarity and details. OK so I can believe these were designed more for accuracy.

What you get.
The FK comes in a very similar packaging as the other SuperTFZ designs. Taller rectangular box with a simple silver-plated copper cable in single ended and several sets of tips, a stereo adapter and a simple pouch. Nothing out of the ordinary. The included accessories are identical to their $79 Force 1 IEM, including its SPC type thin standard cable. Accessories here fall into the category of just OK with no real substance to any of it actually. Nothing that stands out as being good for the price. Just Ok. The cable is again just OK. its tips are just OK, one set is just flimsy and cheap feeling. If you want to optimize the Force King you will have to dig into your Tip collection and better cables. Which I highly recommend for prospective buyers of the Force King. Overall, its accessories get a C- grade. A bit disappointing in what you get but functionable.

The Build
Here is once again just OK. The plastic mass produced housing is filled with what looks like resin which encases the single dynamic driver inside the housing. The shells are gold colored what seems to be a metal plate with colored vents red and blue to separate the sides of the shells. This shiny surface will smudge easily and leave prints every time you handle them. Its fitment is good as its size is a universal medium in bulk. Nothing out of the ordinary. The build here is the same stuff you see for a lot of chi fi IEMs. Much like its thrown in accessories. The way the FK looks and its build is nothing new.. I do believe this exact housing was being used over and over again in their former TFZ offerings. Why change something that works right? The new Force 5 that also came out at the same time as the FK has a unique original housing. Not so much the FK. Overall build is just a C grade. What is surprising to me is that their first release the Force 1 actually has a more premium all resin build vs the Force King. So why the upcharge? It was for its sound.

These are tuned to be more brighter neutral than the Force 1 with a more even balancing, including a more moderate amount of bass. What stands out for the FK is that it has a very good technical ability for its sound presentation. I suppose if you monitor music for accuracy and sound cues that means the sound tuning has to be tight and it has to have excellent details in all parts of its sound. This is not only evident on the Force King but it is the reason why I feel these are a single dynamic folks should be looking into when looking for a highly resolving single dynamic presentation. Its detail level is akin to multiple BAs and or hybrid offerings but from a single larger dynamic. These will surprise just how dialed in, tight and complete they are for imaging, staging, timbral accuracy and detail in general.

The catch
Its included cable is so very average if not just underwhelming. Since the Force King is a detailed monitor presentation. I advise a nicely resolving pure copper type cable to really bring out the musicality in the Force King. This review was mostly done using its included cable. But it was difficult to not throw on one of my copper cables to get an immediate better sound. These love some copper cables and they like a bit of amping as well. As they are, TFZ is guilty of the throw in cable and accessories. Throw in what you got into a package and call it good.

Has moderate lower to mid treble elevation for its treble presence but is more grounded in how it sounds vs being overly emphasized. Its treble tonality has a clean bell-like sound presentation. Its treble articulation has weight with good energy and transparency. Treble accuracy with clarity is very good on the FK with no real glare or treble haze. It does have a full slightly forward treble end to its sound presentation so for folks that are looking for a smoother rolled off sounding experience. These were made for monitoring every note in a recording so you can guess it has zero roll off in its treble presentation. Treble cleanliness is something I appreciate with this sound in that it does not seem to over exaggerate but you can easily make out every treble note with the FK.

I suppose it will come down to how much treble you can tolerate but for me anyways. I don't find the treble fatiguing. It is enhanced but not overly so. Treble balancing is solid on the FK. One aspect I can appreciate about the graphene dynamic TFZ is using on this set and likewise for their follow up IEM the Force 5 is that it is clearly a resolving dynamic driver. Its treble tonality has a better timbre vs BAs or even other types of dynamic material which ends up being detailed in the right way. The resolve of its sound presentation means I can make out micro details on the trebles and that is something not all IEMs in the price range can do.

Of the FK comes in nice and clear. Here is where they have a good amount of upper mid enhancement in conjunction with a moderate treble presence and the tonality comes in just a touch cooler over neutral in its presentation. As mentioned before the included cable does the FK sound no justice but it is good enough to give you a taste of how the FK sound but does nothing to optimize just how good these can sound. A highly resolving graphene driver here being pushed and pulled using highly magnetized dual magnets effectively acts like a dual dynamic in presentation. Its sound coverage from the lowest bass to the upper trebles is complete and FKs mids sound clear, clean with a good body of sound., if not a touch clinical for both vocals and instruments alike. Again this is made for monitoring so it has much less smoothening for its frequencies vs your standard V shaped IEM sound tunings.

Since the tuning is more geared toward imaging, tonal accuracy and details. Its cleaner tonal qualities can sound a touch monitor dry. But using a good copper based cable fixes this aspect right up. I wouldn't call the presentation overly dry but its tuning is at the middle ground of being a bit analytical but one with good balance. Its mids presentation has just enough coloration for it to not sound sterile or aggressive. These are clearly more resolving than their prior intro SuperTFZ IEM the Force 1. Especially noticed on how well it layers and images for its mids presentation. Micro details are easily picked off on these, it has to be one of the best at the price range for its details. But the double edge sword for such detail is that these will not gloss over poorer recordings as much as something that has a lot of coloration to its sound. Its bigger brother the Force 5 is much more rigid, ruler analytical neutral flat vs the Force King. So it is a nice middle ground of one part fullness/ musical, one part accurate/ neutral and another part focused on the technical.

Much like its mids and treble presentation, comes clean and tight in its overall presentation. It has a moderate amount of bass that clearly stays away from the lower mids. With no bass shadow to color the sound tuning its bass is a touch on the dry side here as well. Tight bass presentations are something that I appreciate from a listening perspective and the dual magnets seem to keep the sound of the Force King in check including its bass. It helps that it only has a moderate amount of bass emphasis to help with its overall clarity to monitor the sounds but also helps with its overall speed. The Force King has one of the faster dynamic bass presentations I have heard in a single dynamic IEM. It clearly keeps something like speedy congested metal tracks in place and spaced. Bass has enough impact to be accurate in its bass production. A well-controlled tight speedy bass presentation which all monitor type IEMs strive for. Its little brother the Force 1 actually has the most bass presence of all the more recent SuperTFZ offerings and those are made more for music listening vs being used for double duty as a monitor and listening to music like the Force King.

The Force King shows versatility due to its linear balanced bass. It's no nowhere near bass head territory so folks that like them some bass emphasis will do better looking into its younger arguably better-looking sibling the Force 1. Folks that want nothing to do with bass at all as far as impact goes and don’t mind a highly detailed bright neutral rigid tuning, the newer Force 5 is exactly that. The Force King is somewhere in between the other two in its tuning which makes for a good balance of monitor like neutrality but with enough bass and treble to make them versatile for music listening.

Bass of the Force King is a middle ground from the Force 1 and the Force 5. A solid low hitting bass with not much in the way of roll off for its sub presence. Which ends up being just enough to not make something like hip hop or EDM music sound anemic. The speed of the driver that is being used is on clear display on the Force King and that is something to take notice. No driver being used for IEMs are speedier than the BA as they don't need to move air for that impact but the Force King here does a splendid job to keep that bass speed and tightness on a full range dynamic to have that monitor accurate quality to it. Its presentation is complete and is less colored than most IEMs in the price range. Again much closer to a neutral tuning but has a good quality bass presentation. Seems TFZ was going for more of an accurate monitor type sound signature with just enough bass to make your tracks have a complete and accurate rendition. So you can say the FK quality bass presentation is there to complete the sound profile and give a more accurate account of the bass.

You want your music tight clean with some precise imaging, airy trebles and details a plenty that is what the Force King does exceptionally well. It's not overly neutral like the Force 5 but not a clear V shaped tuning either like the Force 1. I admire that the Force King is very versatile in its presentation and will serve double duty as a stage monitor for vocals/instruments but is balanced well to make every music genre sound proper. It's got a highly resolving driver it is using for its sound presentation which is clearly evident in how it picks off details. It is a shame that the Force King did not come with a proper cable to enhance its musical abilities.

Optimized SuperTFZ Force King.

TFZ made an audiophile friendly IEM in the Force King, enthusiasts that are looking for a highly detailed monitor at the price range should most definitely look into a set of the Force King. Its balance, technicalities and resolve is a clear strong suite. Its wide spacious engaging sound is another. Its been a while since I reviewed what is marketed as a monitor IEM so that makes these a bit unique in the scheme of things. They have a clean, tight sound profile that brings an honest rendition of your music. Which is both good and bad at the same time. Its slightly dry and chiseled presentation can be offset a bit by using a proper cable for it. So while the package or what you get in the box is not perfect, not too many IEMs get that part right at this price range actually so I suppose I can’t fault TFZ in that regard. This is an IEM that deserves a good matching copper cable and some amplification and then you will start to see how nice these can sound. I think TFZ has achieved what they were looking for in the Force King and these will please enthusiasts and musicians alike. Thanks for taking the time to read.
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I have been a TFZ owner over the years, owning over 3 pairs. But what I don't like is how these have the flying wing lady on the side aping Jerry Harvey brand IEMs. That's not cool to ape another brand's logo within the IEM space . TFZ used to have the teddy bear logo, which was unique and cool. But when I see this and I'm thinking is this a collaboration between TFZ and Jerry Harvey and its not, its low-key false advertising to me and its something they need to stay away from doing...especially after being dormant for awhile, this is not a good way forward. TFZ needs to learn from KZ with this community.
I get what you're saying. Not supporting TFZ in any way or form. It does seem like a blatant rip of that logo but the way things goes in China. There are no copy rights In China. It is the wild wild west as far as stuff like that goes. Everyone copies everything in China. That is just fact. I bet TFZ started the IEM business by copying someone else's designs. That wouldn't surprise me one bit.

Something like a logo. That is nothing. At least it's just a logo. I can post links to numerous Sennheiser IEMs that look just like the original. If they can copy Rolex watches down to the studs, a logo is not a thing.


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