The factory that manufacturers the drivers for this set of cans was/is also a manufacturer for many major brands, one of them is AKG. It's no surprise that this model is inspired by the AKG look and sound. However, the build quality is not as solid or sturdy as the AKG models that inspired this particular set of cans. It does, however, make for a much lighter in weight set. I got my first set of 668B over a year ago. I got a 2nd set just so I could rip the drivers out and place them into an on-ear enclosure with mic to control my phone.
I subsequently purchased 5 other models of Superlux cans. However, as of this date, I no longer use any of the Superlux cans - but have them for public use in a studio setting or give them away as gifts. They sound "good enough" and are cheap enough so I don't care if someone breaks them.
For my own personal use, I have moved onto more expensive offerings from Audio-Technica and Sennheiser. If this is your first set of cans with the "hi-fi" sound (not the real thing, but a damn good approximation), you might find yourself up the road spending more for a better set of cans. But be aware that a set that costs 10x more does not sound 10x better. Damn you Superlux for serving as my gateway set of cans.
mliuI forgot about this thread until someone revived it and I was notified by email. Last I said was I no longer personally use them but instead favor more expensive cans from Audio Technica and Sennheiser. 2-years later and that has not changed except for the addition of IEMs from 1more. The Superlux were an excellent gateway set for me that I found towards the beginning of a journey that later involved investing more in more expensive cans as well as amps. Thankfully, that journey stopped over a year ago and seem to be have reached my endgame.
In retrospect, the Superlux cans I've tried are all best value for their money for what I spent. However, one must be careful about the sound signature. The 668b in particular is a somewhat refined flat signature and those expecting fun and ear thumping bass will be disappoint. I would go so far as to say that the 668b beats cans 3x it's price range if the 668b is the signature one is looking for. Those expecting pre-Apple beats (which I do not like) will describe the 668B as dull and lifeless with poor isolation but probably not use those exact words.
These cans are easily outclassed once one goes up to $150, but also one must keep the sound signature in mind. Even though a $150 set costs 5x more, they do not sound 5x better. Yet, I still prefer the higher cost ones.
I subsequently purchased 5 other models of Superlux cans. However, as of this date, I no longer use any of the Superlux cans - but have them for public use in a studio setting or give them away as gifts. They sound "good enough" and are cheap enough so I don't care if someone breaks them.
For my own personal use, I have moved onto more expensive offerings from Audio-Technica and Sennheiser. If this is your first set of cans with the "hi-fi" sound (not the real thing, but a damn good approximation), you might find yourself up the road spending more for a better set of cans. But be aware that a set that costs 10x more does not sound 10x better. Damn you Superlux for serving as my gateway set of cans.