Beyerdynamic DT 900 PRO X Review: An Open Back You Can Drive
Buy the DT 900 PRO X if you mix and want an open back that a normal audio interface can drive to a proper level without a separate headphone amplifier. Skip it if you need headphones for tracking with a microphone in the room, because an open back leaks the click straight into the take.
48 ohms means your interface can actually drive it, which is the practical difference from the older open backs.
beyerdynamic DT 900 PRO X Studio Mixing Open Back Headphones
~$320
An open back circumaural studio headphone built around beyerdynamic's STELLAR.45 driver, with detachable mini XLR cables.
Check price on AmazonSpecifications
| Type | Open back, circumaural, wired |
|---|---|
| Driver | STELLAR.45 |
| Frequency response | 5 Hz to 40,000 Hz |
| Impedance | 48 ohms |
| Weight | 0.76 lb, 345 g |
| Cable | Detachable mini XLR, 1.8 m and 3 m straight cables supplied |
| Approx. price | Around $320 |
Specifications above come from beyerdynamic's published figures as listed on the Amazon product page. Treat pricing as approximate, since Amazon pricing moves.
What it does well
- 48 ohms is the headline practical feature: an ordinary interface headphone output drives it to a usable level without an external amplifier.
- Open back presentation gives a wider sense of space, which makes reverb tails and stereo width far easier to judge than on a closed design.
- Detachable mini XLR cables with two lengths supplied, so a chewed cable is a spare part rather than a new pair of headphones.
- Replaceable velour pads and serviceable parts, so the headphones can outlast their consumables.
- 345 g with even clamp, which matters over a long mixing session more than any specification does.
Where it falls short
- Open backs leak. Recording a vocal with these on means the click track is in the microphone, and no amount of gating fixes that later.
- They isolate nothing, so a noisy household or a fan in the room is part of your monitoring environment.
- beyerdynamic's house voicing has a lifted upper treble. It is detailed, and on a long session it can be tiring.
- Headphones do not have a room, which sounds like an advantage and is not: bass decisions made only on headphones frequently do not survive on speakers.
- At around $320 they are competing with monitors, and in an untreated room the honest answer is often that headphones plus treatment beats headphones plus better headphones.
What owners report
Published owner reviews consistently report two things. The first is that the low impedance genuinely solves a real problem: owners moving from a 250 ohm model describe finally getting adequate level from a laptop or an interface headphone output without a dedicated amplifier. The second is the treble, described as detailed by most and as bright or fatiguing by a substantial minority, which is the long standing beyerdynamic pattern.
Comfort comes up repeatedly as a strength, and the detachable cable is mentioned often enough that it is clearly a real purchase driver for people who have destroyed a fixed cable before.
Where headphones fit in a real workflow
The useful framing is not headphones against monitors, it is what each one tells you. Headphones remove the room entirely, which makes them excellent for detail, edits, noise hunting and stereo placement, and unreliable for absolute low frequency balance because your ears never load the way they do in a room. Monitors put the room back in, for better and worse. The studio monitors versus headphones for mixing comparison sets out the tradeoff, and how to mix on headphones covers the habits that make headphone mixes translate.
If you also need one pair for tracking, an open back cannot do that job and the open back versus closed back comparison explains why the leak matters more than people expect. The usual answer is a cheap closed pair for tracking and a good open pair for mixing, which is why the DT 770 PRO and this model are so often owned together. If you are choosing between open backs, the Sennheiser HD 600 is the flatter and more demanding alternative at 300 ohms.
Who it suits
- Anyone mixing on an interface headphone output with no separate amplifier.
- Rooms too untreated or too shared for monitors to be trusted below a few hundred hertz.
- Editors and sound designers who need to hear detail and noise rather than feel a room.
- Anyone who has previously destroyed a fixed headphone cable.
Who should skip it
- Tracking with a live microphone in the room. Use a closed back for that, always.
- Noisy environments, since an open back offers no isolation whatsoever.
- Listeners sensitive to bright treble, who will find the beyerdynamic voicing tiring.
- Anyone expecting headphones alone to replace room treatment. They give a different reference, not a correct one.
Alternatives worth considering
Sennheiser HD 600 Open Back Headphones
~$269
The HD 600 is the long standing neutral reference in this class and costs less, with the catch that its 300 ohm impedance really does want a proper headphone amplifier to open up. Take it if you have the amplifier and want the flattest midrange available near the price.
Check price on Amazonbeyerdynamic DT 770 PRO Studio Headphones, 80 Ohm
~$200
Closed back with real isolation, which is the one job an open back cannot do. If you only own one pair of headphones and you record with a microphone in the room, this is the correct purchase and the open back comes second.
Check price on AmazonJBL 305P MkII Powered Studio Monitors, Pair
~$319
For similar money you get a second, genuinely different reference that loads your ears the way a room does. Mixes checked on both headphones and monitors translate far more reliably than mixes checked on either alone.
Check price on AmazonKeep reading
- Open back vs closed back headphones
- Studio monitors vs headphones for mixing
- Best studio headphones for mixing
- Sennheiser HD 600 review
- Beyerdynamic DT 770 PRO review
- How to mix on headphones
This review draws on published specifications, manufacturer figures and the consensus of verified owner reviews. We have not tested this product ourselves, and we say so rather than implying otherwise. As an Amazon Associate we earn from qualifying purchases.
Frequently asked questions
Do the DT 900 PRO X need a headphone amp?
No, and that is the main reason to choose them over the older 250 ohm models. At 48 ohms an ordinary interface headphone output or even a laptop will drive them to a proper listening level. A better amplifier still improves control and headroom, and the difference is far smaller than it is with a 300 ohm design like the Sennheiser HD 600.
Can I use open back headphones for recording vocals?
Not with a microphone in the same room. Open backs leak by design, so the click track and the backing bleed out of the earcups and into the microphone, and that bleed is baked into the take. Use a closed back such as the DT 770 PRO for tracking and keep the open pair for mixing. This is the single most common headphone mistake in a home studio.
DT 900 PRO X vs HD 600, which is better for mixing?
The HD 600 is flatter through the midrange and the more traditional reference, and it wants a real amplifier at 300 ohms. The DT 900 PRO X is more detailed at the top, easier to drive at 48 ohms and has a detachable cable. If you already own a headphone amplifier, the HD 600 is the safer reference. If your headphone output is an interface, the beyerdynamic is the practical choice.
Are the DT 900 PRO X too bright?
They follow beyerdynamic's house voicing with a lifted upper treble, and published owner reviews split between calling that detailed and calling it fatiguing. The practical risk is mixing to make the headphones sound smooth, which removes top end other systems then miss. Check against a familiar commercial reference and against speakers before committing to a bright or dull decision.
Can headphones replace acoustic treatment?
They can replace some of what treatment gives you and not the most important part. Headphones remove room reflections entirely, which is genuinely useful in a bad room, and they also remove the physical loading of a room on your ears, which is why headphone only bass decisions often fail on speakers. If the room can be improved at all, corner absorption plus headphones beats headphones alone.
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