Headphones amplifiers — Lehmann Audio Linear Pro

The Linear Pro is a headphone amplifier from Lehmann Audio, sharing power and bandwidth specifications with the Linear-series models while offering a simplified single output impedance configuration. The Linear Pro brings Lehmann Audio's more accomplished current engineering to dedicated headphone amplification.

Key specs that matter

Maximum power reaches 400mW into 60 ohms or 200mW into 300 ohms, matching the Linear-series models. Frequency response spans 10Hz to 35,000Hz within plus-or-minus 3dB. Gain offers four steps - 0, 10, 18 or 20dBu. Total harmonic distortion is over 0.003% at 1V RMS into 300 ohms, with signal-to-noise ratio exceeding 90dB. Output impedance is a low 5 ohms. At 110 x 280 x 50mm and 1.5kg, the Linear Pro shares identical chassis dimensions and weight with the Linear-series models.

Sound and use context

Expect clean, detailed amplification reflecting the solid over-90dB signal-to-noise figure, combined with comprehensive four-step gain adjustment accommodating a wide variety of headphone sensitivities.

Pairing

The four-step gain adjustment and low 5-ohm output impedance suit a wide variety of headphone impedances and sensitivities.

Alternatives

Lehmann Audio's own Linear II offers an alternative with a considerably lower distortion figure within the same broader catalogue.