Nothing can beat the audio quality of these headphones at this price

I am an audiophile. I've been listening to music via various headphone manufactures, price, size and style. I listen to popular music, jazz and classical. I don't want a bass heavy sound made popular by Beats - these sound awful to me. I've used the AKG 240's old and new, Senheisser big and small, Audio-Technica, Sony, etc. I've found a couple of winners in the long-lamented Koss line-up. All This to introduce me.These headphones are big. They come with a thick fixed, 3m cable. Together this means you're probably using them at home, less on the road. They leak as much sound out the back as the do focus on your ears, My dog doesn't known what to make of that. I play my music at low to moderate levels, rarely loud!I've had these headphones for about 6 months and use them at home.For their price, they are well-made. I find them to be comfortable and I like their looks too. But their sound is outstanding. The mids are transparent. The bass is solid and true to the recording - most often solid, sometimes devastatingly powerful. Now to the treble - it's clear and sharp and a tab too much to my ear. I trim this down a bit (~2db at 12Khz) with my equalizer. While I'm in the equalizer, I note that I also lighter the deep base (62hz) by about the same. With these adjustments the sound is balanced.Be aware that good headphones can expose the weaknesses of recordings. That's not the fault of the headphone, it's the quality of the source. These headphones expose poor recordings, maybe not as brutally as some clinical headphones.Some of the other characteristics of these headphones: they are lively, spacy with a big, well-defined soundstage. The midrange has a nice sweet nature to it, which is where most of the music, including vocals, live. Music comes to life in these headphones.I like these phones (with a bit of equalization) better than anything I have, including their nearest neighbour the AKG 240's.If you are seeking a natural sound, to use indoors, and are willing to apply a little equalization, I would recommend them at 3-4 times their price. Yes, they are THAT good.Enjoy.

Qualidade do fone e duração muito boa.

These headphones are fairly well reviewed in many audio websites and in this forum, so I'll try to keep this brief and just rate their various qualities (as I see them) on a scale of 1-10:Aesthetics: (2/10) The headphones look very good but Superlux gets only two points from me here - simply because, aesthetically, the HD681 are less refined AKG (K-240) clones, though the red accents are a nice touch. Cable is one sided but unlike the K240/K240MKII the cable is hard-wired (not detachable).Packaging: (5/10) The headphones are packaged around a piece of cardboard and wrapped in a plastic wrapper. Not that you'd expect more at their price point but the way they sit in that piece of cardboard makes the cardboard dig into the ear-pads. The indentations left in the ear-pads do begin to fade in time.Built Quality: (7/10) The HD681 are made of plastic and feature vinyl ear-pads and a metal-wire bridge. The self-adjusting support head-band is also made of some type of vinyl. Overall they feel quite sturdy, the cable is fairly long (about 8ft) and is terminated with a small 1/8in jack. A screw-on 1/4in jack is included. Both jacks are gold-plated. Also supplied is a carrying bag.Comfort: (6/10) The ear-pads are somewhat on the small size (although they do go around the ears) but they are pretty stiff and they do cause (at least to me) some discomfort. In addition the vinyl makes them get hot even when worn for short periods of time. The HD-681 are very light weight and the self-adjusting head-band works well. Felt/Velour replacement pads from some AKG (and Beyerdynamic) models should work for HD681 but they will likely be more expensive than the headphones.Sound Quality: (7/10) The HD681 use unexpectedly large drivers (50mm) for their price point. Out of the box the sound is very bright (despite having a lot of bass) and a little rough around the edges. After about 20hrs (although not quite fully broken-in) their true sound signature begins to emerge: dynamic, fairly clear (still slightly veiled in the mid range) with vivid highs and a remarkable amount of bass for a semi-open design. The highs texture is fairly soft (not rough or grainy) but they are emphasized excessively (in the 8-12kHz range), so some type of equalization is necessary there. Frankly I find the bass to be too much as well but some people may find that desirable. Also, the bass is not surprising only in quantity but in quality as well as it has a solid feel and is well controlled (even when used with a relatively high output-impedance headphone-amp such as my 5ohm Matrix M-Stage - not the best amp choice for 32ohm headphones). Initially I thought there were some distortions in the lower-mids (depending on the source material) but on repeat listening they seem to be largely gone now. Also, the mid range seems to have gained in heft when compared to the highs and the initial cloudiness has lifted for the most part. I'm assuming they will mellow out some more with prolonged use although it is likely they will remain fairly bright. Overall, for sound quality I'd break things down like this:Bass Extension: 6/10Bass Impact: 7.5/10Bass Texture: 7/10 (solid)Mids Quality: 6/10Highs Extension: 8/10Highs Quality: 7/10 (vivid)Highs Texture: 6/10 (fairly soft)Detail/Transparency: 6/10 (neutral/clear)Dynamics: 8/10 (natural)Soundstage: 6.5/10Imaging: 6.5/10Other:Isolation: 4/10 (semi-open design)Portability: 3/10 (large size)Improvement w/ Amplification: 4.5/10 (Note: It can be easily driven by portable devices to fairly loud levels.)Value: (10/10)All-in-all, an interesting offering from Superlux (a manufacturer of pro-audio gear): they are not quite balanced/neutral enough to be proper studio-monitors but not quite aimed at the audiophile crowd either (more like straddling the fence). My take: for the money (less than $30 shipped), you'd be hard pressed (really hard) to do better. Five star.UPDATE 07/12/2013: (Ear-pad Replacement with AKG-K240 Pads)Much as I like the sound of these headphones (second only to my newly acquired Beyerdynamic DT990-Pro headphones) the discomfort due to their ear-pads being somewhat on the small side for my ears, have led me to the decision to replace the pads with those for the AKG-240 (I've also tried the Beyerdynamic EDT990-VB, velour pads, but these do not fit these headphones). The AKG pads are the same size overall, but the pad "doughnut," so to call it, is a little thinner than that on the original Superlux pads and, as a result, the inner opening is larger at 60mm (rather than the approximately 54mm on the original HD681 pads). The new pads fit my ears much better, since now my ears can actually fit inside the pad completely and there are no more uncomfortable pressure points on my ear-lobes. Otherwise, the AKG pads could get just as hot (with prolonged use) as the original HD681 pads (they are made from the same material: leatherette). From this point of view the Beyerdynamic headphones are much better since their velour pads do allow some air flow. One more note: the new AKG-240 pads are available here on Amazon (for about $32) but I sourced them from Sweetwater (for a more reasonable $20 shipped). With these pads, these headphones are now about $50 - but either way, they still are a smoking deal!SQ: The sound quality remains largely the same as with the original pads save for a bit more bass impact. The original pads did provide very good low end on these headphones but with these new pads my ears are slightly closer to the driver, and perhaps that (closer acoustic coupling) may account for the perceived tightening/improvement of the bass response. The new pads don't seem to tame the highs more than the original pads, so some EQ is still necessary there, though with continued use (I have now more than 120-140 hrs on these cans) the high end has mellowed somewhat. To conclude, the replacement of the stock ear-pads on these headphones with AKG-K240 pads was (to me) well worth the added expense (which nearly doubled the cost of the headphone).

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This is a very good headphone for the price. And as the online reviews say, the sound quality is excellent.