Some of you have asked me to compare these two bass heavy headphones to see which is KING. I have never owned or auditioned Ultrasone prior to buying the Pro 900. The Pro 900 is not cheap with the street price of $399 on Amazon. If you missed my unboxing video, you can watch it here.
After a few days of continuous burn-in, I spent some time listening to the Pro 900 and did some comparison against the Sony MDR-XB1000. Like in all my impressions/final thoughts, all music files are AIFF uncompressed from my 2010 Mac Mini fed to my Cullen Modified PS Audio DAC connected to my Lehamann Audio Black Cube Linear amp. I chose this headphones amp because it is neutral (no added flavor) and very powerful featuring TWO headphones out with enough power to spare.
Ultrasone Pro 900, Design & Comfort:
I like the design of these. Kinda reminds me of my Sony MDR-V700dj with the swivel cups. The ear pads sits on my ears and I did not find it uncomfortable with hours of listening. Clamping pressure is pretty tight, but I don't have an issue with that. I like the velar ear pads, no sweat issues. The headphones came with a straight cable as well as a coil cable terminated with a high grade connector.
Ultrasone Pro 900 vs. Sony MDR-XB1000 Sound Quality:
The highs on the Pro 900 is very different from what I'm used to. There is a spike at the upper high frequency. It's a bit hard to listen to loud. The highs is what I call "love or hate" relationship. You really have to audition it before you buy it. The bass is nice and full and a bit forward. It's tight with a bit of boom to it. The midrange is a bit recessed, but not is a bad way. The overall sound is like listening to a car stereo with two 10" subs in the trunk and the tweeters up high on the door panel. I use 10" subs because it is missing some sub-sonic bass found on 12" or 15" woofers.
Compared to the Sony MDR-XB1000 the Pro 900 is very different. Bass on the XB1000 is bumpin' and you can play it loud and not notice it. I find that you get a nice bass pressure in my head that I didn't get on the Pro 900. The bass hits low and nicely defined compared to the Pro 900. I say the XB1000 is like standing in the middle of the dance floor of a professionally tuned night club. It's loud, but you like it. Soundstage is wide and spacious. If you like rap/hip-hop and you like brilliant highs and bass like subwoofers in a car trunk, the Pro 900 is your man. If you like the bumpin' sub-sonic bass in your head with smooth highs, the XB1000 is it. My pick is the XB1000.