Linear D

Linear D

Clarity, power and class

Try the Linear D now in Ashburn
stereoplay HIGHLIGHT 11/2021 stereoplay HIGHLIGHT 11/2021 FIDELITY Award, Winner Premium Award 2020, Category Headphone Amplifier/DAC FIDELITY Award, Winner Premium Award 2020, Category Headphone Amplifier/DAC Goldenes Ohr, 1st place category headphone amplifiers, AUDIO 2019 Goldenes Ohr, 1st place category headphone amplifiers, AUDIO 2019 Goldenes Ohr, 1st place category headphone amplifiers, stereoplay 2017 Goldenes Ohr, 1st place category headphone amplifiers, stereoplay 2017 High Quality, Design, Ease of Use, Plus X Award 2016 High Quality, Design, Ease of Use, Plus X Award 2016 Best Amplifier, CanJam Europe 2015 Best Amplifier, CanJam Europe 2015

Linear D info sheet

Since Lehmannaudio turned the “emergency exit” of classic hi-fi amplifiers into a gate to a new musical perception with their Linear back in 2004, headphone outputs with frustrating sound have become a thing of the past. The Linear D in its topical mk II version demonstrates that there’s always room for improvement: its digital-analogue converter of the latest generation and its thoroughly revised analogue board let you experience all-new horizons when listening to your favourite music – goose bumps guaranteed.

"Already the first bars foreshadow its potential, the music is reproduced with enormous clarity."

— Hifi & Records

Comfort and performance

The Linear D mk II is the perfect complement to streamers and CD players. It recognises digital signals, automatically selects the optimal input and needs no input selector. The Sabre DAC from ESS on the quad-layer circuit board, which has been optimised against HF interference, offers both digital S/PDIF and Toslink inputs.

Low-loss mica capacitors on the mainboard and in the converter analogue filter as well as ultra fast amplifier stages on the converter board guarantee reference quality. The thoroughly revised analogue board in Low-Z Copper provides as yet unheard-of dynamics. Owing to three settings the Linear D mk II adapts to the most diverse headphone-source combinations, and with one analogue and two digital inputs it also delivers a breathtakingly expressive performance as a streaming preamp on active loudspeakers.

The Linear D mk II makes people happy who want to enjoy music in an intense and pristine way and brings together those who share musical enjoyment: two parallel outputs on the discrete class A solid-state output stages powerfully feed two headphones of equal impedance without compromising the listening experience. 3S absorber feet decouple the Linear D mk II from its base and provide calmness. So the Linear D mk II sounds even more sculptural now: with lush, yet never ostentatious lows, delicate resolution and zero-gravity elegance over the entire frequency range.

Turn the massive, damped potentiometer of the Linear D mk II. Rediscover your analogue and digital musical treasures!


Click on the picture and drag to the left or right, to view the Linear D all around.

360° Slider

Technical Data

The impressing technical details of the Linear D.

Linear D
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
analogue board in Low-Z Copper
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 TOSLINK (automatically prioritised)
1 x RCA 75 ohms
Sampling Rates
32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 192 kHz
24 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


Available upgrade options for the Linear D (production series until December 2018)

Order form

Order form

Upgrade for the analogue board

The new Linear II mainboard is equipped with the improved components of the Linear SE board and built using a special low-impedance technology (low-Z copper) which raises the price of the naked PCBs by a factor of about 10. But the effort is worthwhile. This technology results in even better dynamic values, but above all it produces once again a significant increase of the sonic performance: transient response and spatial imaging are even closer to the original.

Here’s how

Download the order form. Print it out and send the filled out form together with your device to the given address. Within a few weeks you’ll get your modified device back and can pay conveniently by invoice.


Upgrade with the new low-Z copper analogue board starting from 499 EUR
Optional extra: installation of 3S device feet plus 99 EUR
Shipping via UPS within Europe included
Payment method: invoice

Order your upgrade now


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

Mounting Kit

Mounting Kit

With our mounting kit your Linear D 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 D and your favourite music to a new level.

See our brochure for full details (PDF)