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Ultrasone PRO 900

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MSRP $599.00
This product is no longer available at HeadRoom.

With a fat bottom-end and strong presence response, the Ultrasone PRO 900 is a very good sealed headphone for the Hip-Hop/Urban/Dance/Trance listener. This full size closed-back headphone will provide solid isolation from the outside world as you pump the jams up in your head. Very sturdy German build quality with a nicely long cord, velour earpads and padded head-pad make for hours of excellent listening comfort without fatigue.

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Product Features:

  • Big round bass for the contemporary music listener.
  • Closed design isolates you from outside sounds.
  • Big velour earpads and head-pad for comfy listening sessions.
  • Rugged build quality will endure the rigors of the road.

What's In The Box:

  • Coiled and straight cables
  • Extra replacement set of earpads
  • Ultrasone 1/4" to 1/8" plug adaptor
  • Instructional CD/owner's manual


Germany's fast-rising Ultrasone PRO 900 brings rich sound and urbane looks to closed/sealed headphones. Although still considered new kids compared to some other European headphone makers, Ultrasone's highly advanced 'S-Logic' and 'ULE' technologies are touted to offer the safest long-term use of full size headphones by minimizing radiation of the intrinsic magnetic fields generated by the headphone's electrical elements. The PRO 900's unique MU-Metal bufferboard and highly reduced field emissions are in accordance with the Ultra Low Emmissions standards prescribed by European Union [EU] bylaws. Ultrasone's recently refined 'S-Logic Plus' works to enhance headphone imaging ability by formulating a more cohesive "3-dimensional natural surround sound" presentation of the recording field within the headphones; this feature becomes especially obvious with classical/ symphonic audiophile recordings full of instrument position information and directional 'room-sound' cues. Hence, the PRO 900's soundstage is expansive and nicely deep-sounding. Expect musical detail at all frequencies from the PRO 900's offset  large-wave 40mm titanium-plated drivers, smooth transitions from tonal color to color, and warm bass-friendly timbral textures, all mated to isolating sealed-back (and comfortable!) circumaural earcups. A great headphone candidate for pro audio, studio tracking, or demanding mixing/mastering engineering applications--and also perfect for serious audiophile home theatre listening room use too. The PRO 900 sits alongside the top echelon of sealed-back headphones and is a must-hear for all audio professionals who spend LOTS of time wearing headphones.

The spiffy black-on-aluminum grey Ultrasone PRO 900 headphone has a fully detachable 9.5ft cord that exits from the left earcup--no tangled "Y" cord issues here--which is easily owner replaced if ever required. The Ultrasone headband construction is incredibly flexible and allows the earcups to fold up and into the headband, ideal for collapsing the headphones down to a lumpy bundle for transit or storage. The Pro 900 cord terminates to an excellent Neutrik 1/4" full-size connector; a mini-plug [3.5mm] adaptor is handily included for use with iPods, portable players, or laptops. The simply superb Ultrasone 'Pro' packaging includes both a coiled and a straight headphone cable along with pairs of grey velour fabric and black pleather earpad sets--a nice option that more headphone makers should consider as a plus for customers. The Pro900 also has a hard-sided, very sturdy carry-case that effectively doubles a secure long-term or transit storage for the headphones. An Ultrasone demo/instructional CD offers directions and insights into the Pro 900s new-fangled technologies. The free 2-year manufacturer's service/repair worldwide warranty is standard from Ultrasone ONLY when purchased from true authorized dealers -- like HeadRoom!


  • Manufacturer Warranty: 2 years
  • Headphone Type: Full Size
  • Connector Type: 1/8
  • Weight: 295 grams w/o cord
  • Isolation: -12dB ~ -18dB
  • Impedance @ 1kHz: 40 Ohms
  • Detachable Cable: Yes
  • Cord Length: 10 ft. (3 m)
  • Cord Type: Straight Left-Side
  • Ear Coupler Type: Full-Size
  • Driver Type: Dynamic
  • Acoustic Seal: Closed
  • Sensitivity: 96 dB

Reviews At A Glance
3 Reviews

Average Rating 
(Showing 3 of 3 reviews)

My Best Pair of Headphones Yet
Posted by DJ LP from Baltimore on 2012-10-04

Recommend Product: Yes
Pros: Built like tanks, a lot of detailed bass, big soundstage for a closed headphone
Cons: Have to rotate pads sometimes

I also own the Ultrasone Pro 650's, which were the best sounding head phones I ever owned until now. After reading reveiws About the Pro 900's, I wondered how much better could they be. Big difference between the 2. An increase in bass that's more detailed and textured. Actually, everything across the board was more detailed and textured. Listening to them on my Denon receiver (AVR-5308ci) they're still a bit bass heavy. I also purchased the HiFi-Man 601. The combo is sweet because now the Pro 900's have a very dynamic organic sound with a huge soundstage. The one thing I don't like is rotating (turning)the pads to get the best sound. You have to do that from time time to time. It can take about 20min to get it right.

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3 out of 4 people found this review helpful. Did you?

The best sealed headphone I ever tried.
Posted by Peste Razor from Turin, IT on 2011-05-03

Recommend Product: Yes
Pros: Comfortable, incredible imaging, extended sound stage, Good value
Cons: You REALLY have to burn-in them. 150 hours.

The Ultrasone PRO 900 comes up with a beautiful semi-rigid case featued with a coiled and a straight headphone cable along with pairs of grey velour fabric and black pleather earpad sets.
The S-Logic™ technology delivers the best imaging ever and they offer the most terrific sound-stage I've ever heard in a closed headphone.
Ultrasone PRO 900 are actually the best audiophile headphones you can find for their price.

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17 out of 23 people found this review helpful. Did you?

Great for bass lovers
Posted by 12345142 from Toronto, ON on 2010-12-30

Recommend Product: Yes
Pros: Sturdy design, great bass, great imaging
Cons: somewhat unnatural tonality, may sound unbalanced to some

Upon listening to them, the first thing about the Pro 900s that grabbed me was the bass. Then, it was Ultrasone's S-Logic Plus technology, two features that set the Pro 900s aside from the rest.

The bass is great. It's deep, powerful and punchy. Maybe it's a bit too imbalanced for me, but I'm fine with it - these are a fun pair of headphones. I don't plan on Kees-modding them, but I might consider covering some of the holes on the metal plate - maybe. I don't find the mids to be recessed at all. The highs have great definition, although they can be a bit sibilant and peaky at times. Overall, the Pro 900s have an aggressive sound that's more suited to similarly aggressive genres such as punk, metal and techno. I don't think these are the type of headphones I could listen to for hours on end, but rather ones that I'd listen to one album at a time with. That being said, I don't think there are any serious flaws in the sound signature.

A common issue some people have with the Pro 900s is that their tonality seems 'off' or unnatural, and I can confirm that they are slightly cold-sounding. My K702s have a fair bit more warmth in the mids, but I'm not complaining, although I'm fairly tolerant when it comes to different sound signatures. The S-Logic Plus can feel weird at first, but upon getting used to it, I can hear a gapless soundstage with a good center area, something that's hard to produce with headphones. Compared to the K702s, the Pro 900s' soundstage is slightly unnatural and smaller, but placement of instruments is very precise and the 900s are able to convey a believable sense of distance, which is quite impressive. Overall, I'm impressed. I like these headphones.

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24 out of 24 people found this review helpful. Did you?

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Ultrasone S Logic Technology

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