Linear USB II

Linear USB II

Sound voyage with your ears

Try the Linear USB II now near by

Linear USB II info sheet

Since 2004 the Linear has thrilled all music lovers who expect their hi-fi amplifiers to perform at their best also with headphones. Can this success story still be surpassed? Yes, it can – and how!

The Linear USB II comes up with a digital-analogue converter of the latest generation and a fully revised analog board using the high-grade Low-Z Copper technology. Physical, punchy lows and a filigree resolution over the entire frequency bandwidth: you will never again consider your headphones just as a makeshift solution.

Best of both worlds

Keeping an eye on your needs at any time, the Linear USB II delivers an impressive listening enjoyment due to its three gain settings – even with the most diverse headphones on very different sound sources. As a headphone amplifier and preamp it joins the carefully selected components and sophisticated circuitry of our crowd favourite, the Linear, with the digital world.

Enjoy your musical treasures from PC, Mac or even your mobile phone in audiophile quality. The Linear USB II automatically detects an incoming USB audio data stream and does without an input selector switch. For double listening pleasure our new champion is ready to feed two headphones simultaneously and as a streaming preamp, it also spurs on your active loudspeakers to play with amazing vigour.

3S damping feet decouple the Linear USB II from its base and bring about quietness. In every situation a fabulous sound, always striving for perfection – that’s our Linear USB II.


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Technical Data

The impressing technical details of the Linear USB II.

Linear USB II
Analogue section
Input impedance
47 kohms
Maximum gain
0 dB, 10 dB, 18 dB, 20 dB
selectable via DIP switches
Frequency response
10 Hz (-0.3 dB) to 35 kHz (-1 dB)
Signal to noise ratio
> 100 dB at gain 0 dB
< 0.001 % at 6 mW/300 ohms
Channel separation
> 80 dB at 10 kHz
Output power
400 mW/60 ohms
200 mW/300 ohms
Output impedance
pre-out 50 ohms
phones out 5 ohms
Connectors audio
Neutrik headphone jacks with gold plated contacts
1 x pre-out
2 x phones out
gold plated RCA sockets with teflon insulation
Power consumption
15 W through internal, regulated power supply
Special feature
PC board in Low-Z Copper technology
vibration-absorbing 3S Device Feet
Outer dimensions W x D x H
110 mm x 280 mm x 44 mm (4.3 x 11 x 2 in.)
1.5 kg (3.3 lbs.) net

Digital-analogue converter
Digital inputs
1 x USB B
Sampling rate
up to 384 Khz
up to 32 bits
ESS Sabre K2M
Analogue filter
Silver Mica capacitators
Max. output level DAC
1.8 V eff.
Special feature
The analogue input is automatically activated, when no digital signal is recognised


With our accessories you can get even more use out of our products.

Mounting Kit

Mounting Kit

With our mounting kit your Linear USB II mounts quite easily and inconspicuously on furniture and walls.

See our brochure for full details (PDF)

3S Device Feet

3S Device Feet

Our 3S Device Feet take your Linear USB II and your favourite music to a new level.

See our brochure for full details (PDF)


hifi & records

"The Lehmannaudio Linear USB II is a phantastic sounding pre and headphone amplifier. It adds resolution timbres and spatial imaging to a convincing sound picture – so well that I couldn’t wait until Christmas to buy it."

Read the whole article (PDF)


"An unpretentious appearance with high-class interior – this has been Lehmannaudio‘s formula for about 25 years. The Linear USB II stays right on this track as well."

Read the whole article (PDF)