SKU: 80130289643

Lehmann Linear Usb Headphone Amplifiers

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Description

Lehmann Linear Usb Headphone AmplifiersLehmann Linear Usb Headphone Amplifiers Lehmann is a company that specialises in phono and headphone amplifiers. The Lehmann Audio Black Cube Linear USB is an unusual proposition in that it manages to be a headphone amplifier, a preamplifier and a DAC all at once. Admittedly, viewed as a preamp, it's a bit basic, because it features only one analogue input, and the DAC has only one input which is USB (when this is active, that is when it detects it is

Lehmann Linear Usb Headphone Amplifiers

Lehmann is a company that specialises in phono and headphone amplifiers. The Lehmann Audio Black Cube Linear USB is an unusual proposition in that it manages to be a headphone amplifier, a preamplifier and a DAC all at once.

Admittedly, viewed as a preamp, it's a bit basic, because it features only one analogue input, and the DAC has only one input which is USB (when this is active, that is when it detects it is connected to a valid source, the analogue input is bypassed). So really this is an analogue/digital input headphone amp with a volume controlled line output!

Heady power

Lehmann's idea of what constitutes a headphone amp is generous, with a full push-pull power amplifier output configuration. Of course, the power levels are lower than for an amp intended to drive speakers, but there are nevertheless four power transistors on heatsinks waiting to drive the load. And their ability to do that is impressive.

We obtained output powers of up to one-watt into low impedances and any kind of headphone, from 15ohms to 600ohms (which is pretty much the full range for dynamics), stand to receive at least 100mW.

We have to say that actually listening to any headphone when driven that hard is really not a good idea, but it's nice to know that at any sane level there's plenty of headroom.

Blue velvet 

You may already have noticed from the photograph that there are two headphone sockets on the front of the unit, of which one disconnects the line output and the other doesn't.

Next to them is the volume control, a traditional mechanical type from the Alps 'Blue Velvet' range. It's typical of the whole unit in being a high-quality component and the unit is powered from a generous internal toroidal mains transformer.


The phono sockets and USB input are a bit jammed-up at the rear and only labelled underneath the unit, but it's all easy enough to deal with.

Flexibility is enhanced by a couple of little slide switches underneath the unit, which give gain adjustment in 10dB steps.

Pure and simple

Restricting ourselves to sensible listening levels, we tried this amp with various headphones from Grado, Shure and Beyerdynamic, and found it an excellent and fearless performer. It's slightly less at home with the lowest impedances (as typified by in-ear phones), with which it can develop a trace of tonal coloration, but across the range it is quite beautifully detailed and unconstricted.

It also does some very impressive things with bass; keeping it strong and precise but never accentuating it. Indeed, it's almost the perfect example of an iron fist in a velvet glove.

Treble is no less competent: sweet and open with minimal sibilance, though over-bright recordings are still going to sound that way, one of the undeniable drawbacks of headphones (plenty of recordings are just about acceptable on speakers, but simply sizzling on cans).

DAC to the test 

All the above refers to the analogue input. We've mixed feelings about the digital input, though. It's good and indeed of its kind (using as it does a single, familiar, chip to receive and convert the digits) it's very good, but it's still not the equal of some of the very fine DACs that are around for £200-£300: we're thinking, of course, principally of the Cambridge DacMagic and the Arcam rDac.

Either of those could be had for about the price difference between the basic Black Cube Linear and the USB version and bothoffer higher quality and more fl exibility. In fact, either of those two could add a little resolution to this DAC and generally remove a veil or two between you and the music.

Of course, if simplicity is something you strive for and one USB input is all you need, it's much less of an issue and we can't deny that this is enjoyable via USB. Via line in, though, there's no question: it's a very fine headphone amp indeed.

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SKU: 80130289643

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Donald Kollmansberger
Phoenix, US
★★★★★ 5
Its a buy for me. I love this.
Size: TKL- Tenkeyless
The wrist rest is perfect, it stays cool, it feels great on the wrists, perfect height, good value for money, feels very durable, the shape and smell is perfect.
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Reviewed in the United States on January 8, 2026
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Yunior
San Leandro, US
★★★★★ 5
Comfortable, Supportive, and Worth Every Dollar
Color: Black, Item Shape: Classic, Color: Black, Item Shape: Classic
I didn’t realize how much tension I was carrying in my legs and lower back until I started using this footrest. The memory foam is firm but comfortable — it doesn’t flatten out like cheaper ones. I love that it’s height-adjustable, so I can customize it depending on how I’m sitting. It instantly improved my posture and took pressure off my hips and lower back, especially during long desk and gaming sessions. The build quality feels premium, it stays in place on the floor, and the cover is soft and easy to clean. After using it for a few days, I noticed less stiffness and way better overall comfort while sitting. If you spend hours at a desk, do yourself a favor and get this. Simple upgrade, huge difference. Highly recommended.
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Reviewed in the United States on February 13, 2026
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Karen Schneeberger
Alexandria, US
★★★★★ 5
Foot rest
Color: Gray, Item Shape: Classic
It's very sturdy. It's very comfortable. It's not too soft. It's not too hard. I like it. I flip it when I sit in my chair when I'm on my iPad I can use the lower level when I'm relaxing. I flip it over and I use the the round part of it. It's just perfect for me.. I have plantar fasciitis and it really helps the heels of my feet.
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Reviewed in the United States on April 10, 2026
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Bruce Cardos
Boise, US
★★★★★ 4
Good product.
Color: Black, Item Shape: Classic
It is helpful for sure. I had knee surgery and this helped me keep my knee comfortable while working. I wish it was able to raise my leg up a bit more but for the price this is fine.
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Reviewed in the United States on February 24, 2026
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Mae Stevens
Natrona Heights, US
★★★★★ 5
Great for short peeps!
Color: Gray, Item Shape: Teardrop
the best for a too tall desk or table or not correct height chair. 5’3, always too short for things and this has definitely helped since working at home! super soft too and different surfaces and heights!
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Reviewed in the United States on May 13, 2026

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