Integrated amplifiers — Audionet HUMBOLDT

The HUMBOLDT is a flagship-tier integrated amplifier from Audionet, built on a transistor circuit using the brand's proprietary Air Flow Design topology, with all analogue circuits galvanically isolated. The HUMBOLDT brings Audionet's most storied German engineering to a serious, extensively isolated integrated-amplification format.

Key specs that matter

Input impedance is 50,000 ohms balanced or 35,000 ohms single-ended. Output power reaches a substantial 320W into 8 ohms, rising to 460W into 4 ohms. Frequency response extends from 0Hz to an exceptional 700,000Hz within plus-or-minus 3dB. Signal-to-noise ratio exceeds 120dB. Four separate power supplies are used - two with 100VA transformers and two further substantially larger units - each dedicated to isolating specific circuit sections. At 450 x 320 x 505mm and a substantial 61kg, the HUMBOLDT represents a serious commitment reflecting Audionet's most accomplished current integrated-amplifier engineering.

Sound and use context

Expect exceptionally clean, uncoloured amplification reflecting the exceptional 700kHz upper bandwidth combined with the galvanically isolated analogue circuits, with the proprietary Air Flow Design topology and four-way power-supply isolation delivering reference-tier noise performance.

Pairing

The substantial 460W-into-4-ohms output combined with the exceptional 700kHz bandwidth make the HUMBOLDT compatible with a wide range of demanding loudspeaker loads.

Alternatives

Audionet's own broader flagship catalogue, including the Heisenberg and Schrödinger monoblocks, offers related separates alternatives within the same considered engineering philosophy.