Lehmann Audio Linear USB II Headphone Amplifier Streaming Preamplifier

Linear USB II Powers Headphones with Reference-Grade Performance

Linear USB II headphone amplifier is a premium solution engineered to deliver audiophile-level performance with every playback. This high-resolution streaming preamplifier from Lehmannaudio integrates advanced digital-to-analogue conversion with studio-class analogue circuitry to transform ordinary headphone listening into a detailed, physical sound experience. It is an evolution of the acclaimed Lehmannaudio Linear series, designed specifically for demanding listeners who refuse to compromise on sonic precision.

Linear USB II Combines USB DAC with Class A Headphone Amplification

Linear USB II is a hybrid headphone amplifier and USB DAC that offers seamless playback from digital sources like PC, Mac, and smartphones. Its ESS Sabre K2M chipset processes audio at up to 384 kHz / 32-bit, supporting formats including PCM, FLAC, MP3, WAV, and DOP128, while a Silver Mica capacitor analogue filter ensures ultra-clean signal output. This allows users to extract more definition and nuance even from compressed or low-resolution audio streams, such as internet radio.

The discrete Class A output stage delivers high-fidelity amplification with minimal distortion, ensuring an open, natural tone across the frequency range. With selectable gain levels up to 20 dB, the Linear USB II adapts effortlessly to a wide spectrum of dynamic headphones—from high-impedance audiophile models to more sensitive consumer types.

Linear USB II Offers Dual Listening and Streaming Preamp Capability

Linear USB II headphone preamplifier features dual Neutrik headphone outputs with gold-plated contacts, enabling simultaneous listening through two sets of headphones. This makes it ideal for shared sessions in mastering environments, audiophile comparison testing, or private dual-listening enjoyment.

Beyond headphones, the Linear USB II functions as a streaming preamplifier, delivering high-current output via gold-plated RCA pre-outs to drive active speakers or external power amplifiers with impressive musicality. The 50-ohm pre-out impedance allows long cable runs without signal degradation, ideal for home studio, office setups, or high-end desktop environments.

Linear USB II Maintains Sonic Purity Through Low-Z Copper Design

Lehmannaudio Linear USB II amplifier is built with a Low-Z Copper PCB, a premium construction that reduces signal path resistance and electromagnetic interference. This meticulous board layout supports a signal-to-noise ratio above 100 dB and a total harmonic distortion of less than 0.001% at 6 mW/300 ohms. It maintains channel separation greater than 80 dB at 10 kHz, creating a soundstage that is deep, well-structured, and emotionally engaging.

The internal linear power supply is oversized for stability and delivers consistent 15 W output. Paired with low-loss MKP precision capacitors, this enables fast transient response and superior detail retrieval.

Linear USB II Enhances Listening Comfort with Vibration Control

Lehmannaudio’s Linear USB II DAC/amp is decoupled from external vibrations using proprietary 3S Device Feet, which isolate it from resonances caused by furniture, desktop surfaces, or speaker output. This engineering focus ensures sonic purity in every playback scenario.

The aluminium faceplate, available in silver, black, or chrome, matches modern hi-fi aesthetics and can be installed inconspicuously on furniture or walls using the optional mounting kit. At just 1.5 kg, with compact dimensions of 110 x 280 x 44 mm, the Linear USB II is a space-saving DAC amp solution ideal for both professional and personal audio environments.

The Lehmannaudio Linear USB II headphone amplifier and streaming DAC exemplifies German engineering and audiophile craftsmanship. Whether used in a mastering studio, audiophile listening room, or high-performance desktop setup, it delivers exceptional transparency, dynamic articulation, and a musically immersive experience worthy of reference systems.