Superlux HD668B Headphones

Product Information

I jumped on the Superlux train quite late – it must have been around spring of 2013 or 2014. That’s when I thought it could be fun trying such an inexpensive circumaural headphone and therefore bought the Superlux HD681.

The design inspirations of these HD681 headphones were most likely rooted in the AKG K240 MkII. In fact, the HD681 is a close relative of that inspirational model.. of them went to my kids, to learn to listen to music as it was recorded, instead of getting hyped sound out of "fancy" brands (where 50% of the budget goes to the "artist who developed the product line") ...

The HD330Pro’s appearance and handling

The midrange is definitely nicely tuned and follows a flat, diffuse-field oriented tuning wherefore voices sound natural and realistic – something that is especially nice to hear on headphones this inexpensive. The N650’s midrange has denser notes, making vocals more intimate and closer to the listener, even though the N650’s midrange is more recessed. That double bass line is a lot punchier on the Nhoord Red V1, it's not as mellow, though there is a much more balanced bass response. Still though, the horns aren't quite as bitey with the Nhoord either, it gives them a really beautiful sweetness! Overall, the Nhoord brings a more balanced response, which works nicely in this jazz piece! As I notice the paino more with the Nhoord than I did with the Superlux HD 668B. With my HD681, I was quite surprised that it had something that could be called slight noise isolation, and with the HD668B, I can also report that there is a little bit of isolation, but it is not much at all and doesn’t mask my keyboard’s or the fan’s noise although noise isolation is very slightly more present with the HD668B than with my HD681, probably because of the stronger clamping force. Cons - The Superlux HD330 fault is the cable, yes it is supposed to be long and coiled, but it is extremely tight and not comfortable to expand.

Pros: Spacious sound with good clarity, depth and punch making them ideal for gaming. Gorgeously musical. Ridiculous price. The HD-660 are good-looking headphones. They are mirror images of the popular Beyerdynamic DT770 which has classic monitor headphone styling. The build quality of the course is nowhere near that of the Beyers however but that is not to say it is bad. The cups are made from solid feeling plastic and with some metal where the cups swivel. stars: The product is only about average or even somewhat below that and somewhat flawed/flawed in some areas. [neither "Thumbs Up" nor "Thumbs Down"] Second, if you like bass, you won't like these. It's all about a clean and even clinical sound. Sound that makes you dissect music instead of listening to it. The B in the name of the HD 668B's stands for balanced, but they are not balanced at all. There is a clear preference for highs that gives the headphones a "live" sound in audiophile lingo. Most audio engineers I know would probably call this kind of balance: "good for analytical monitoring".

we engineer light

With classical and melodic music, the voices and instruments sound organic and with a hint of forwardness. This also shows a well controlled bass execution that does not muddy the mids.

As with many other headphone manufacturers on the market, Superlux doesn’t exactly overload us with information regarding Bluetooth codecs that are supported by this device. In fact, there’s no information on this whatsoever. As such, we’re left to assume that the current standard, SBC, is the default. This is a shame, since SBC offers the lowest audio quality of current codecs in the mix. When it comes to other technical data, there’s a more reliable reference point. We measured sound pressure levels at a maximum of 99.61 dB SPL, with an average impedance of 38.55 Ohm. This means that just like its big brother, the HDB671 delivers sufficient volume, even when connected to low power outputs. It’s therefore an ideal choice for connecting to desktop and laptop devices, tablets and smartphones. What’s more, its audio transmission range of 20 Hz to 20 kHz covers all frequencies you might require for home studio recording and mixing applications.. Features, Processing & Handling, You don't get enveloping sound with them. Imagine sound laid out inside an infinity symbol rather then a circle. Any sounds that are far in front sound like they are either above you or in your brain though things that are slightly off to the sides are well positioned. In the mids and treble, both are more or less on the same level with the HD681 only sounding airier because of its tonal tuning. The HD681’s treble is probably a slight bit cleaner however it is more aggressive as well as edgy. Mids are not pronounced and are covered up by the harsh sounding Treble. This can be fixed with an equalizer or mods.

For the price, the imaging and separation that the 668b offers are incredible. Instruments can be differentiated from each other with clarity, their location and the distance between them on the stage can be perceived. There is also excellent articulation between voices and instruments. Treble is good. Refined but can be too bright to people who are used to Senn HD600 type of sound or headphones that are even darker. These two sounded surprisingly similar. The Superlux is more detailed for sure, as the KSC75 gets more bass texture. The price increase over the Koss is clearly all going to the build. This shows as I am not afraid to be a little rough with the 668B. I also found the sound of the 668b to be more analytical than the KSC. In fact, I would even mix with the Superlux. I’m way late to this party but you know what? I’m glad I came. Have you been looking for a super affordable headphone but are overwhelmed by all the choices out there? Let me simplify it for you; The Superlux HD668B is exactly what you’ve been looking for. Gaming: Very detailed and relly good soundstage, I remember my first COD 4 match with these, I even heard enemies across the COD 4 Map Showdown. That was awesome and since that day. I cannot play without them. (Edit: This is no longer the case xD).