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Lehmann Audio Linear USB Headphone Amplifier

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The Lehmann Audio Linear USB Reference Headphone Amplifier has a built-in DAC which is meticulously built with an integrated Burr Brown DAC and separate voltage regulators of highest quality. The USB connector is only used to transport the signal and not as a power supply.

The Linear USB is a high end headphone amplifier that will satisfy even the highest requirements for quality headphone music reproduction.

The selectable gain (0 dB, 10 dB, 20 dB) of the Linear USB effectively optimizes the output level of the zero global feedback Class A output stage. Practically all high quality dynamic headphones available will show their best possible performance. Carefully selected top notch components and a highly sophisticated circuit design guarantee top performance listening pleasure.

For stereo setups consiting of your computer and an additional analog source like a CD player or a turntable with a phono stage the Linear USB is the simplest and most effective active preamp one can think of. You don't even have to care about input switching because the unit detects the USB audio signal automatically!

The faceplate and the massive milled aluminium knob for the smooth running 27 mm ALPS high grade volume control are available in anodized black or silver.

Key Features:

  • Class-A output stage with zero global feedback
  • Excellent sonic performance
  • USB-input for computers  from USB 1.0 and upwards, works with sample rates up to 48kHz
  • Additional analogue input with RCA and 3,5mm jack connectors with loop through
  • Automatic input selection with USB prioritisation
  • Maximum gain selectable up to  20dB for the use with practically all dynamic headphones
  • Double sided audio board layout for optimal parts placement and trace routing
  • Burr Brown audio grade components
  • Only Low-ESR electrolytic capacitors
  • Gold plated RCA audio connectors
  • Highly sophisticated, clean power supply. USB is used for data transfer only.
  • Nonmagnetic case (aluminium)

Technical Data:

Input Impedance:47Kohms
Max. Gain (Switchable):0dB, 10dB, 20dB
Frequency Response: 10 Hz (-0.3 dB) to 35 kHz (-1 dB)
Signal to Noise Ratio:>95 dB At 0 dB Gain (Analogue)
THD:<0.001 % At 6 mW/300 ohms
Channel Separation:>70 dB/10 kHz
Power Consumption:App. 10 W,
            Internal Regulated Power Supply
            With Anti-Interference Toroidal Transformer
Output Power:200 mW/300 ohms
            400 mW/60 ohms
Output Impedance: Line Out - 60 ohms
            Headphone Out - 5 ohms
Dimensions: 280 x 110 x 44 mm³ 
Connectors:Neutrik Headphone Sockets
            6.35mm With Gold-Plated Contacts
            1x Parallel To Line Out
            1x Line Out Muting
            Gold Plated RCA Sockets With Teflon Insulation
Weight:App 1.5Kg
USB Sampling Rate (Digital):Up To 48 kHz
USB Resolution:16 Bit
Max. Voltage USB - DAC: 1 V eff
£849.00
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