Pros: Deep impactful bass, great soundstage, extremely detailed highs and mids, comfortable, look great, detachable cable, efficient
Cons: Recessed mids, not the most portable, leak quite a bit of sound, highs can get a bit extreme at times, HIGHLY recommend an amp (Fiio E11)
These are some excellent bass-head headphones. The sound is extremely clear, with an extremely tight, deep, well-textured and impactful bass, a clear midrange, and a very detailed high end. The mids are recessed, so if you don't like a V shaped frequency curve, then steer clear from the PRO 900. The highs can get a bit extreme at times, but I wouldn't call it harsh or piercing... I actually find it quite enjoyable. As well, the soundstage is excellent for a closed headphone, and the lows, mids and highs are all seperated very well. The PRO 900 are also very comfortable imo, and can wear these for hours, because of the soft velour padding. They look great, with the all black matte finish and the aluminium ear cups. Even though these headphones are efficient, I HIGHLY recommend an amp, such as an FiiO E11, which will drive them more than fine. Also, the PRO 900 are not the most portable, as they are pretty darn big. Overall, excellent headphones which I wholeheartedly recommend.