Pros: cheap, kinda comfortable, long thick cable, fairly tough built (and easy to fix), GOOD SOUND BASE FOR EQUALIZATION (CLEAR)
Cons: confort (pleather pads a bit too hard, sweaty maybe), ''BAD'' SOUND SIGNATURE WITHOUT EQUALIZATION
While reading this review and testing out some things i provide, please remember i am not an audiophile, i do not actively (consciously ?) seek 'audio neutrality' or 'flat frequency response', i just want a clear sound, where all frequencies are easily hearable, and with no 'side effect' (too 'cold', 'warm','hollow',....).
I also enjoy low frequencies (bass) but not to a point they 'choke' the rest of the spectrum, or cause fatigue over time.
Finally keep in mind this review is targeted at users wanting to equalize this model, i will not detail the 'stock' sound signature of the headphones (TL:DR no bass, few mids, powerful/'harsh'/'piercing' highs), i also use dolby headophones but found the sound signature (frequency response) wasnt really affect by this tech when used with other things (see spoiler).
I pretty much listed all there was to know about the SR-850 in the Pros and Cons section, if you want 'comments' on the aesthetics or on the fact the base sound signature was made to be 'similar' to some other $150+ headphones please look for the already existing reviews on the internet.
I honestly find the 'base' (+ 'burn in') sound signature meh, i know these headphones were made for 'studio' use and that's perfectly fine (i guess) but for my personnal use the sound was 'bad', clear/sharp/'accurate'/'separated', but bad (see intro).
I bought a Xonar U3 USB because i wanted to experience the effects of dolby headphones (gaming in mind at the beginning) as the 'burn-in' was done (?) i immediately heard the difference with some no-name headphones i had (no more muffle) but the sound was not at my taste, i started equalizing and here we are now:
What I find good, please click on the pic it's a GIF (Click to show)
good bass, present mids, clear highs, overall 'balanced' and 'clear' 360° sound without too much of an echo (DH+virtual thingie)
This EQ is used 'universally', for all types of contents including music
If you're interested in buying this model, there is an 'evolved' better version that adds detachable cable, a set of velour earpads, sound adjustements (+bass -harsh highs), and a redisign and other stuff i dont know lol : SUPERLUX 681 EVO
edit: after writing the review i did a little tweak : i plugged the U3 directly to an USB port (front io here, was using an USB extension cable) and one of the 'problems' that was a faint ringing, dissapeared.(edit2: maybe also the very faint white noise, not sure) also had to restart for equalizer APO