Superlux HD-668 B - Reviews
Pros: Good all around sound and PRICE
Cons: For this price, no cons
Wish I had bought the HD-668Bs before spending all that money on other headphones.
Not as fully adjustable as my other headphones, but fits my head size fine
and should work for most people
The clamping force is just about perfect for me.
They are all plastic and fake leather, but that as good as one can expect for the price.
I really do like the way they are designed.
If I was designing headphones this is exactly how I would have done it.
They are semi-open, but most people around you would have a hard time hearing whatever your listening to.
You can hear outside noise, but not enough to interfere with what your listening to.
They come with a 3' and 10' cable, would not have minded if they also came with 6' cable.
Would be nice if they offered a higher end model with Velour pads.
Pros: Stunning clarity and balance
Cons: Comfort issues, build quality feels cheap.
I chose to review these with my FiiO E7 with my E3 LOD to my iPod Classic as they definitely need some juice. The E7 is able to power these to comfortable listening levels though without a worry.
The Superlux HD668b came packaged in a rather cardboard box which I actually found to be pleasing to look at on the front. It's not eye catching, but it doesn't need to be. It simply says Superlux on the front with the model number and "Professional Studio Standard Headphones," with a picture of the HD668b taking up the rest of the space. On either side of the box the included contents are shown with many languages present to tell the information. The back has technical specs in various languages with a serial number and contact information.
The packaging isn't flashy, but I actually really like it. It is classy and old school and has a charm about it I really like. The box is also rather thick cardboard, it doesn't feel cheap. 
Inside is an instruction manual, the Superlux HD668b headphones, a cloth carrying pouch, a 3m cord, a 1m cord and a 1/8th to 1/4 adaptor. Nothing excessive, but well packaged. I'm happy with the included items and couldn't really ask for more.
Design and Build Quality
When I read some reviews on these I thought they looked beautiful, a nice mix of Audio Technica and AKG. When I received them I noticed the pictures were very flattering, it's not that the Superlux HD668b look bad in person, it's just easy to see that they are rather cheap looking. They still look fantastic, but the plastic and rather cheap construction is apparent.
The feel of these is rather cheap plastic with faux leather pads and thin metal wires as opposed to the thicker ones on the Ad900. For $50 though I can't blame Superlux, they obviously can't spend a huge budget on the quality of materials in the way Audio Technica can, especially when they're focused on the sound. Overall though, while they look cheap, I don't see any problems with durability. The removable jack on the left earphone is a nice touch, 2.5mm female plugs into the headphones. The cable is a bit thin and cheap feeling, but there's no problems I have with it sound wise or durability wise so far. I will say that I wish Superlux included a medium cable as the 3m is a bit too long and the 1m is a bit too short. I like that it terminates into a straight plug though.
When worn they do get a bit hot, despite the semi-open design, which really feels like a closed design and offers decent isolation. The pads do get a bit hot and there's some clamping which has cause my listening sessions to be kept around 1 hour or so. The clamping isn't huge, but it's definitely apparent. Overall though they feel decent on the head, I'm simply used to open headphones, noticeably my Ad900 which are amazing in comfort.
Overall I feel like Superlux did a good job with obviously a small budget. They feel and look good for the price, but it's apparent they had to skimp somewhere when compared to my Audio Technica Ad900.
Sound Quality
I really couldn't believe my ears for these. I let them burn in for 30 hours as Kevin at Superlux has informed me and put them on. "Wow, these cost how much?" Was my initial reaction. The sound is fantastically balanced with amazing clarity and a natural sound, that rivals my Ad900. While these are labeled as Studio Monitors don't let that fool you, I'm having a lot of pleasure listening to these, they aren't as music as my Ad900, but are more musical than my Ad700 and HD558. The bass extends well and has a nice full warm sound, it does lack impact though for electronic music such as drum and bass. The lows do leak a little into the mids a bit, but only so slightly as to make them sound a smudge recessed. The mids are full sounding with excellent clarity. They don't have the forwardness my Ad900 have, but they do a wonderful job for rock music regardless. The highs are a little tame, but they extend well. By tame I mean that they aren't piercing or overly bright. They still extend well with excellent clarity. The soundstage is great, it's not as big as my Ad900 or Ad700, but it definitely gives the music some room to breathe. Time to listen to some tunes!
Modest Mouse - Doin the Cockroach
While this song is admittedly lo-fi, I chose it because of it's quick pace and distorted guitars. The bass line is something I don't think I've ever heard properly, in-fact on my Ad900 it's barely noticeable. On these I hear it wonderfully, without it muddling the mids. The vocals and guitar sound wonderful. The vocals sound astoundingly natural, the guitar is able to be easily picked out through it's hazy distortion and sloppy playing. The headphones are able to keep up with the tempo no problem. Everything honestly sounds absolutely wonderful and natural on these.
James Blake - Limit To Your Love
The vocals and piano sound wonderful on these, absolutely wonderful. The notes ring out with a nice naturalness and clarity, nothing artificial sounding here. The heavy bass definitely extends well, but there's no rattling in my ears. I hear the bass and the headphones are able to keep up with the quick pace, but there's no feel of it. These definitely aren't for bass heads, but they do reproduce the lows wonderfully without muddling up the rest of the frequencies in this song.
Feist - I Feel It All
I chose this because it has a lot going on and is a nice sibilance check. The drums, acoustic guitar, tambourine, electric guitar and vocals all sound wonderfully natural. There's no hint of sibilance, which is fantastic. This song is a good test for sibilance and the HD668b pass. Feist's voice simply sounds wonderfully silky smooth.
High Contrast - Return of Forever
I chose this liquid DnB track to see how the Superlux would handle a fast paced song. The song has a nice balance in it. The repetitive bass line sounds right where it should be, the quick drum beat is sound as it should it doesn't feel slow or bloated and the miscellaneous sounds are easily apparent. I definitely like the HD668b for electronic, though I feel the Ad900 have a little more impact than the 668b making me choose them for dnb usually.
Rolling Stones - Sympathy for the Devil
This song has a lot going on in it, a lot of instruments. The various hand drums and shaker sound wonderful at any part of the song and remain a strong backbone for the rhythm of this song as the bass piano and vocals come in. The song sounds very natural and no instrument sounds more present than the next, at any point of this song I'm able to easily discern an instrument from the next. I'm very impressed for this song.
While the build quality and comfort isn't superb it's definitely more than average for the price from my experiences. The build quality is about on par with the Audio Technica Ad700, for instance. The looks are fantastic, I love the AKG/Audio Technica hybrid look. The detachable cable is also a very nice addition. The sound quality is superb with these, they easily rival $100 headphones and I find myself reaching for them over my Ad900 at times, they completely make my HD558 obsolete in my opinion, I'll never reach for them again.
If you're looking for a cheap, good looking headphone with excellent sound quality to price ratio look no further. The only problem you'll run into is finding a place that stocks these.
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I do not own the Superlux yet. I do however own the AD700. One thing thats very apparent and expected at the lower price point is that the Superlux cans are a bit cheap looking and feeling. Now I truely feel that the AD700 is a VERY well built phone . Nothing feels cheap about it. It's mostly metal and the little plastic contained is very high quality. I'm not saying anything about the Superlux's to put them down....but the AD700 is NOT a cheap headphone in any way. I actually believe it has the build quality of a $400+ headphone. I've held super expensive cans that felt cheap compared to the AD700.
very nice review keanex!
Pros: Neutral Sound, detail in all range, good soundstage (AFTER EQ Adj.)
Cons: Kinda off balanced (Need EQ adjustment)
Here's my quick review:
Sound Quality: 
Solid Bass, detailed mid and vocal, crisp treble, very good soundstage, no amp required, but off balanced.
Range Balance: (and my EQ adjustment of my COWON D2)
Bass and mid-high:  Perfect amount (EQ+1/10)
Mid:  Very slightly low (EQ+1/10)
Mid-low:  Kinda too low (EQ +2/10)
Treble:  Too bright. (EQ -1/10)
Comfort, light weight, need better cushion pad(too thick material: fake leather: sweaty)
What you should do:
It sounds too light and too crispy without EQ adjustment and burn-in. 
It'll become a real giant killer(well balanced neutral sound) only if you add some good amount of mid and mid-low and reduce its high range at the EQ setting.  Also, about 5 hours initial burn in, will makes its sound a lot warmer.
Is the HD-668B a good buy?  Yes, definitely but would only recommend to people who have a good mp3 player or good audio system with good EQ setting function.
Would these go great with the ASUS Xonar D1? Also, which type of pads can one put on these cans to make them more comfortable?
You can put the AKG k240 cushion pad on the hd-668b, which is softer and with real vinyl, but it's definitely not cost effective.(Cost about $40!!!) I think the original cushion pad isn't that bad, it's kinda hot and sweaty when I have it on for over 30 minutes in summer, it don't have any problem when the weather is cooler. Not sure about the ASUS Xonar D1, haven't used it before, but I would think any MP3 player or audio system with EQ setting that has at least 5 frequency range to adjust and with good quality of sound output then it should work fine.(The HD-668b is more toward the crisp and bright side, it requires good EQ adjustment to have it balanced to have its potential)
Pros: (in context of price) detail ,resolution, soundstage, fast-taut bass
Cons: (in context of price) bright ... bright ... bright
Got 2 pairs for US$65 ... gave one to a friend who is a bass-head (plays video games and runs it through movies [ DVDrips]) and kept one for myself.
After a year, here is our skinny on these El-cheapos:
Get the ugly part out of the way --> These boys are unforgiving and bright and WILL show up your crappy music systems. If the recording was brightly mastered/crap, if your source is bad, if your cables are bright (esp. pure silver and silver plated stuff), if your amp/dac setup is too revealing THEN these babies are RUTHLESS. They will show up the brightness and amplify the crap out of the brightness to make ears bleed.
No .. they will not flatter anything. They just let you know something is really amiss in your chain of music production.
Hence: although easy to drive (low impedance, high sensitivity), these are NOT for badly ripped MP3s, not suitable for porta-ipod/phone/mp3 players and not for your cheap PC music cards.  Forget it, you will get better sound elsewhere. You have been warned!!
Now for the honest truth about these phones - look carefully at the reviews. The folks who have a decent setup, and putting thru good quality sources (properly done CDs/FLACS/SACDs --> decent DAC --> decent amp) all enjoyed them, or were smitten by their price/performance ratio.
They may not beat the big boys costing 5-10X more in price (certainly not the Denon D5000 or the Grado PS1000). But unlike the other cheap crap in the sub US$100 range, they don't get worse as you up the ante, they get better - and better to the point of lunacy. No cans priced US$ 30 should be giving owners of Senn HD 600/Denon D2000/AKG 240/Grado 125 (Yes between my friend and I, we have had all these for extended periods in the past) raised eyebrows ... but this one does.
Yes its still slightly bright, and its bass doesn't extend low enough, neither is its midrange meaty and alluring enough ...BUT ... it IS still impressive for US$ 30.
Its best you treat these as studio monitors, as they were intended by their creators. But if you ever want a really ruthless pair of cans to weed out a weak kink in your setup, then try these out. If your systme boogies on these baby, then you can try out any other more esoteric headsets and have something to smile about.
Best review on these phones by a long shot. Congratulations good sir!
Bright cans??? Bright cables, bright cards??? What are you talking about, man? HD668B are analytical, not bright. I use these on my Motorola Bravo. Though my bravo's right channel is a bit louder than the left and output is a little crappy, HD668B performs great and makes me forget about these disadvantages of the source. Of course, I admit that on Audigy 2 sound is much better. But anyway these sound great with my Bravo, with my PC, with the cheap, unbranded player I own.
Pros: Sound- bass, treable, mids, stage accuracy
Cons: Not very portable, pleather cushions make you sweat when is warm..
Killer headphones for the money.  Very hard to dislike. People who probably paid more money for AKG K240's (which sound inferior) would probably criticize them. I work in the audio retail industry and have experience with Grado - full line, Sennheiser - full line, AKG full line, Goldring, Beyerdynamic. 
There is definitely something magical about their sound that makes me return to them again and again even though my collection includes: Sennheiser - HD600 and 250II Linear, Beyerdynamic DT990pro, 770 - 600 ohm, AKG K240 - 55 ohm, Grado SR80 and I-Grado.
I have to mention  that I did few mods: First I removed the thin black fabric from the enclosures and replaced with organic cotton pads one for each side.  Second I replaced the logo plastic caps with wooden ones and third I cut felt pieces and replaced the bass pads that cover partially the drivers (mine cover tiny bit less)
I listen mostly classical music, jazz. I also listen some 70's prog rock, acoustic rock and electronica. I listen analog or uncompressed digital files (SACD, 24/96, 24/88.2, 16/44.1)
I don't know how MP3 will sound with the HD668B .  I use FLAC on my portable player and the sound is pretty good. People who are complaining about comfort should listen Grado SR60 for couple of days and switch back to the HD668B.
I think the HD668B are killers for their price and Superlux is a great company which makes affordable products with great sound quality.  Now enthusiasts and professionals who couldn't afford to buy 5 pairs of AKG's for their studio can do that with Superlux without compromising the sound.
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Its nice to hear good things about my headphones from other people. I was wondering if you could described how you performed those mods and how they improved the headphones or direct me to a thread about that. Thanks!
^agree to the comment above....I literally just clicked the buy now button on Amazon for a pair of these for $46.99 and I really want to do the mods you talk about in your posts. instructions and preferably pictures of the final product please?
Cons: Cannot drive extreme bass freq
This, headphone has weak performance on extreame bass respond (especially for editing movie sound tracks), i was return it back to the store after couple hours, and then compared it with the "new three" same model, but the sound are same, so i changed my order with sennhesier dj headphones, but none was better (superlux hd 668B & sennheiser hd 205) was cannot drive extreme bass freq. I also owned headphone from mice manufacture called "Genius", and my model is hp-04 live, this headphone was cheap, below "$20", yes the overall sound is bad!, but this headphone can drive extreme bass freq,
If your source cannot deliver extreme bass performance, so i guess the others user reviews is right for you.
You went full retard. Never go full retard.
This is painful to read.
lmao funniest thing i've read all week. I like how you gave "value" almost perfect score.
Pros: Feels solid, can play very loud, comfort, detachable cable, good value
Cons: exaggerated bass and treble, sibilant, looks a little cheap
I got my hands on an HD-668B today...

I still wonder what's up with these AKG clones... Is Superlux paying license fees to AKG so they may use their classic K 240 design for their headphones? One could certainly think so since a reputable dealer such as Thomann in Germany is selling them and they probably don't want to anger the Harman group :)

Let's have a look at the headphone itself...

The earcups' construction certainly looks a lot like AKG's K 240 design that has been around for ages. On this one, the outer headband is a little different and instead of an inner headband, it has "wings" with cushions that rest on the head.

The build quality and materials feel pretty solid but look a little cheap compared to a real K 240 (though not bad for the price!).

The vinyl earpads seem a bit thicker and more dense than AKG's. This may not be such a bad thing as the baffle of real K 240s tends to press on my outer ear after a while. Real AKG vinyl or velours pads can be used if desired.

The cable is detachable and the headphones come with two cables that are 1m and 3m in length. This is a nice touch, especially since the two cables can be combined, giving you 3 lengths to work with.
I don't, however, like the "connector" on the headphone that much. On the left earpiece, there is a thick piece of cable with a TRS plug attached to it. Since the connector on the earpiece is flexible, it is likely that the wires inside will break after prolonged use, thus requiring soldering. This does defeat the purpose of having a detachable cable in a way.

I'm giving the headphones only one star for "design" because you can hardly call it original.

So... how do they sound?

These phones have been called "giant killers" but I'm not sure I'd subscribe to that theory.

Compared to a K 240 Studio, the 668B has more bass and treble. While this isn't totally excessive, I wouldn't really call this headphone neutral. The treble response tends to make sibilant recordings sound a little unpleasant and I would prefer a flatter bass response (in fact I prefer a K 240 DF to the Studio or Monitor versions).

Due to the somewhat exaggerated bass and treble, the midrange suffers a bit and voices can sound a little thin.

All in all, the sound isn't too offensive, though and the headphone seems to be able to play really loud with little distortion.

As always, take my description with a grain of salt since your HRTF or head shape (or taste) may vary :)

I'd say for the € 30 they cost around here, these phones aren't half bad. At less than a third of a the price of the K 240 S (still available in some shops), I think they're a good value.

Would I get one for myself? Probably not, since I do prefer a more neutral sound and I also like the quality and full spare part supply of real AKGs.
People who are not audio geeks or who don't mind a "fun" sounding headphone will probably be quite happy with the Superlux.
I find it a bit hard to translate my opinion of these phones into a star rating.
I think 3/5 for audio quality is fair since there is definitely room for improvement.
As an "overall" rating, I also can't really give it more than 3/5 since I wouldn't personally buy it.
I think for value it does deserve the full score since the user does get a solid product for a pretty low price and most people probably don't mind a little bass and treble boost at all.
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Pros: Very clear and transparent, big soundstage, excellent instrumental separation, sweet midrange
Cons: Big, highs can be a little too much, slight grains in the high frequencies, the guilt that comes after realising how much you paid for it...
Pros: Neutral
Cons: Neutral (boring to someone)
Sounds for me quiet neutral and well balanced.
The comfort maybe not perfect, but reasonable (better than you can expect for this price)
I added AKG Velour earpads for 25 USD.
Pros: complete frequency range, tight sound, comfortable even for BIG heads!
Cons: cabling options
Just plugged these into my Audiotrak Im-Amp and they sound great straight out of the box.  Based on the sounds I'm hearing now I'm selling my HD650's and recouping/releasing the funds for other interests.  
To my ears, they really are that good.
I have a BIG head and found the clamping force of the HD650's rather tight but the HD-668B are comfortable from new.  I might get some plushy pads for an AKG or something to reduce the sweatiness the faux leather pads will no doubt induce.
SOUND: Straight out of the box they have a more complete sound than the HD650's.  Maybe its the lack of the Sennheiser 'black' veil?  I think its probably a slight lift in the mid-high frequency range.  But thats fine by me as the so called 'telephone band' is where we as humans are most sensitive.  Bass has been said to be light but I put this down for the fuller mid-highs.  
Insight is incredible, given the price and obvious effect it has on build quality.  On the first 2 or 3 songs i played I noticed things I'd not heard before.  Notes played on 'real' instruments begin and end just as you would hear a real instrument to do.  Vocals never seem to push into sibilance which I found an issue on some recordings with the HD650's 
As noted above, these are good enough for me to have sold my HD650's  
BUILD:  Lots of plastic, but are 'high end' phones really any different?  Not really.
My only real bugbear is that the cable options are rather limited as the HD-688B have a 3.5mm jack on the left hand cup and you have to connect a cable from there.  Sure its easy enough to make one up but I'd like to be able to wire straight up to the driver.  Never mind - for £35 inc shipping I cant really complain so I'm off to listen to them again.
GIANT KILLER? Maybe, maybe not.  But good enough to leave the £300+ phones alone for a good long time.  
Good for you! And you bought them at a great price.
Just wait 'til they break in (around 150 hrs) - you will be addicted.
Many of us 668B owners mod them...PM me if you get the urge...
Pros: Tight bass, mid-range is nicely detailed, treble is bright and sparkly
Cons: cable is not horrible but just so-so, bass is a bit weak in authority
These are a very comfortable headphone that is also light on the head. The pads are bice but a bit cheap feeling. The overall design is solid though and they feel like they would stand up to regular use without a problem.
Sonically they are a brighter signature than what I like:
The treble is the best aspect of these as it is detailed and articulate without being sibilant.
The mid-range is nice with decent detail but is not rich or warm enough for my tastes. Others might find the mid-range nice and neutral though.
The bass is is tight and fairly deep but lacks volume for me. But again other might find this nice and neutral.
The sound stage is about average in my opinion, neither large or small. If I was to make a comparison I would say it is slightly smaller than the HD600.
Pros: Very cheap, good imaging and clarity, detachable cable
Cons: Boring mids, lack of extension at the top and bottom, not very energetic
A surprisingly capable headphone under 60$ (which includes the AKG velour pads, much more comfy and changes the sound slightly and some useful accessories are provided in the box as well) with a reasonably balanced and detailed sound and it sounds surprisingly clear at its price point which is impressive at first listen. 
But it is far from perfect: it is let down by a midrange that is thinner than I'd like and that it is not a very energetic or extended sounding headphone. The soundstage could be bigger as well, although the imaging is very good. And the build quality isn't anything to write home about.
Pros: cheap
Cons: built
No doubt, the 668 is a great value.
The sound is on par with some 200$ cans, and therefor really impressive.
But it is far from reference headphone level, specially the mids and balance are not even close. Built quality is surprisingly good for the costs, but still flimsy and made out of rather non elegant materials. The cable plugs are a nice gimmick.
Is it a winner? Definitely!
Is it close to Beyer 880 or Senn 600 class? No, the 668 sounds really good for 50 Ohm type, but it is far from the constant quality and the comfort of the upper class.
Pros: Neutral, revealing, precise, lightweight, sturdy, cable features
Cons: Strong clamping force (gets better with time)
As the saying in the title goes, this has never been truer than for these headphones.
Thankfully, Superlux sells sound quality, not an overhyped brand name. Can you really get great sound for $40? Oh yes, and it's right here.
I was recommended these headphones by a fellow forum member and after a day or two of investigation I decided I really liked what I read about them and figured if it was true, then these would be the best headphones I could buy on my really limited budget. So, I did.
Before I give any impressions, a small disclaimer: My previous headphones were Trust HS-6200 5.1 USB, and Trust Multi Function Headset 310. The most "hi-fi" component I have in my house is a set of Logitech Z-5500's. They run via coaxial, while everything else runs from the motherboard Realtek ALC889 codec (best Realtek codec, but still onboard.) So, I have not had much experience with quality components, but I know how to trust my ears. Hopefully, this will be enough to make a relatively accurate assessment of these headphones. Let's take it from the outside in.
Design: Well, the first thing that surprised me is that they are relatively small. I expected them to be a bit larger from the pictures. The next thing is, they are really light, weighing only at around 200 grams, which is good as it makes them easier to keep on the head for longer periods of time. The build is fairly sturdy and the plastic is of good quality, they look like they will last long. I'm not going to comment much about aesthetics, aside from the "Studio Monitor" labels being a bit tacky, but I generally like the way they look.
Comfort: A bit on the tight side. Causes my ears some discomfort after having them on for a while (upwards of 2 hours), but after a few minutes break it's good. I've read some people claim it made their ears sweat and heat up, I haven't had those problems but I don't normally sweat much anyway.
Accessories: With these headphones you get a 3m cable (for PC use) and a 1m cable (portable use) which you can exchange and even combine together. You also get a 3.5 (1/8") to 6.3 (1/4") mm jack adaptor, which is a nice feature, and a carrying pouch to, well, carry them around.
I liked the cable flexibility the most, I think it's a great idea.
Sound: And here we go, the most important part. I'll try to refrain from analyzing these headphones in the typical fashion here such as how the "highs, lows, mids, etc." sound as I don't think I'm familiar enough with the terms here but I will attempt to describe their overall sound signature with my limited experience, so here goes. What you play through them is what comes out. A bad recording will sound bad, a good one great. They are really transparent, simply "passing on" the sound without leaving a hint of presence of their own. And honestly, I like this. I want to hear my music the way it was recorded, intended to be heard. I don't want headphones to change my music. Sure, colored headphones may make it sound more "fun", but that's not the way the artist heard or made the track. Well, to each his own I guess. To continue: they reveal a lot of detail. A lot. Background hiss, noise, breathing, coughs from artists and stuff I have never heard before in my music. I have to play through everything again, to rediscover all those tiny details I missed out until now. The frequency response doesn't have many spikes, and it corresponds with what you can see on the manufacturer's website.
Soundstage, well, it's generally good. Certainly better than the closed-back headphones I own. These are only semi-open however. Sound isolation is still OK, I can hear myself typing and my noisy PC case, but when music plays it's hardly audible. To sum it up for the Superlux HD668B: Add nothing, reveal everything.
Oh, one more thing: the bass. I've seen a lot of people claim the bass isn't strong enough, while a few claimed the bass was good. And I believe I know why. It actually depends where you plug them in. If I plug them into my PC case's front port, the headphone out on the Z-5500, my cell phone or MP3 player, the bass is overwhelming, in fact there is more bass than there is in the 5.1 headphones that had a dedicated subwoofer inside, and it certainly does not sound natural. However, if I plug them into the rear ports on my motherboard where there is supposedly a headphone amp the bass tames down by around 80%.
EDIT: After a bit of longer listening, I've realised that it's not the amount of bass that changes. It's the amount of mids and highs. The thing is, the output ports on the back of the motherboard are assignable. If I set the jack to "speaker out" they give a line level signal, and the headphones sound substantially less clear and you have to turn the volume up from 35 to around 80; this gives the impression that the bass is louder - it's not, it's only that the signal is not strong enough to drive the mids and highs up to point. When switched to "headphone" setting, the headphone amplifier kicks in and the higher frequencies -really- jump up, leaving the bass behind at the "normal" level. This is why it seems it has less bass. So even though these headphones are only 56 Ohms, they certainly benefit from amping, and well at that. Line-level won't cut it.
Overall, I am extremely happy with them, will keep them around for a long time. My next purchase is going to be an Asus Xonar Essence ST, I can't wait to hear what they will do then. Well worth the money I paid for them and more, and would recommend them to anyone in this price range, for sure.
Pros: dynamic, deep bass, relatively balanced, analytical, good soundstage, very inexpensive
Cons: slightly recessed lower mids
I won´t repeat what everyone else wrote before - because it´s true. I´ve listened to a Beyerdynamic DT990 once and while I love my Sennheiser HD-600 a different cup of tea would be nice sometimes. But then, Beyerdynamic headphones are a bit too expensive for the sole reason of being able to listen to "another flavour". Thank God there is Superlux. You´ll get so much material for your money. You´ll also get very good, Beyerdynamic-like sound. You can even improve the sound if you replace the pleather earpads with the velour pads for the AKG K-240. I don´t know why but they sound a bit more balanced and refined with these earpads. Further improvement can be achieved by putting paper tissue between earpad and cup (increases the distance from ear to driver and will likewise improve comfort).
If you do these two things you´ll get a headphone that will rival headphones for 150-200 Euros: they are dynamic, precise, crisp, balanced with a very good soundstage. They are easy to drive but they will sound best with good amplifiers. They won´t be impressed by loud or harsh music, they will just play along with just the right amount of directness. Some people would argue that this makes them sound a bit "bored" - which sounds almost insulting to me because they are anything but boring. People seem to confuse balanced sound with boredom. Well, let me put it this way: if you want your headphone to colour the music you´re listening to... go and search elsewhere. The Superlux does indeed add a bit colour (around 7.000 Hz) but it´s not very much and it´s not distracting. However, lower mids seem to be a bit underrepresented - but I could be fooled about that because I´m accustomed to the comparatively (to the Superlux) warm mids of my HD-600.
All in all, very, very good for the money. A true bargain, thank you Superlux.
P.S.: before I forget... they need considerable burn-in time to sound their best.
You mean, they do have a fixed cable? K-240 have a detachable cable and socket. So a mini-XLR cable from K-240 won't fit...
Where did you find the replacement pads for the Superlux? The velour pads for AKG K-240. 
Could you describe the paper tissue mod in somewhat more geometric terms? Was that several layers of paper tissue covering the whole surface and absorbing some of those harsh highs while also distancing the cushions from the cans themselves? Or some kind of folded ring along the edge, staying out of the way of the speakers?
Pros: Neutral sounding :-)
Cons: Neutral sounding ;-)
I recently got these headphones from a german online store after reading the raving review at While it left me quite sceptical, I thought ca. $35 isn't that much of a risk to take and they'd even be worth the price if they just had a decent sound quality.
But they haven't. They have an incredible sound, just like the reviewer at headphonia and the previous reviewer here have described it. They are very detailed, very much extended into both directions of the frequency spectrum and sound just wunderfully neutral. The highs are brilliant but not shrill or sibliant, the bass is punchy but not muddy and overwhelming, the mids are tight and precise - it's just everything there as it should be, nothing added and nothing left out. If you prefer a more coloured kind of hi-fi sound like the Grados are known for, these cans aren't for you. If you prefer a neutral, "honest" kind of sound, I doubt you'll get any better cans below $200. Personally, I love the synergy the Superlux show on a crossfeed. It "warms" up the sound just to the right amount, giving a slight boost in the bass and further refining the headphones convincing soundstage. I prefer that combo to most much more expensive headphones I know.
The only thing, however, that constantly reminded me of wearing a headphone was the pressure of the pads, which made my earlaps hurt after an hour. I solved this problem by adding a little spacer (made out of paper tissue...) to the back of the earpads. Considering the headphones quality it would also be worthwhile to replace the "pleather" earpads with some higher quality AKG ones.
Another detail I love about this cans: they come with two sturdy, detachable cables (1m and 3m, combined 4m) to ideally suit your needs. Great idea!
Pros: Very natural, transparent, accurate, fast sound, fairly comfortable, nice looks
Cons: Headband can press on head a little and tight space for ears in earcups
These headphones don't seem to add anything to the recording. It feels like they have absolutely no color of their own. Good recordings sound incredible good! Mids are delicious but not overly emphasized like in some phones. Bass is not weak, very strong actually, and it goes deep, but it's volume isn't too loud. I use a little EQ to give bass a boost. Highs are best I have ever heard. They are delicate, soft, not too bright but still very accurate. And they extend really well. 
I am just listening to music with these, not headphones. These are very detailed headphones, so every nuance in original recording and source comes through. The soundstage is very realistic.  
Build quality felt a little cheap at first but the excellent sound quality makes up for that. Headphones are very lightweight so they should be comfortable. The auto adjusting design means that the wing pads press a little to my head. I need to keep breaks after two hours of listening. 
These are very cheap headphones but that is only a huge plus. If you want to have quality sound and also pretty comfortable phones then pick these! If I wanted better audio quality I should prepare to spend 10x the money these cost! 
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