Power amplifiers mono — PS Audio BHK Mono 300 Power Amplifier

The BHK Mono 300 Power Amplifier is a distinctive hybrid tube-and-solid-state monoblock power amplifier from PS Audio, built with substantial output power and a remarkably low output impedance. The BHK Mono 300 Power Amplifier brings PS Audio's more accomplished current engineering to a serious hybrid monoblock format.

Key specs that matter

Input sensitivity is 1,300mV, with input impedance at 100,000 ohms balanced or 50,000 ohms single-ended. Output impedance is a remarkably low under 0.1 ohms single-ended. Output power is a substantial 300W into 8 ohms, rising to 600W into 4 ohms. Gain is 30.5dBu. Frequency response spans a wide 10Hz to 200,000Hz within plus-or-minus 3dB. Maximum power consumption is a substantial 1,600W. At 434 x 221 x 356mm and 37.6kg, the BHK Mono 300 Power Amplifier represents a serious hybrid monoblock commitment.

Sound and use context

Expect a distinctive hybrid character combining tube-stage warmth with solid-state power delivery, with the remarkably low output impedance ensuring clean signal transfer.

Pairing

As a monoblock, two units are needed for a stereo pair and the substantial 600W-into-4-ohms output handles demanding loudspeaker loads.

Alternatives

PS Audio's own BHK Mono 600 Power Amplifier offers a considerably more powerful alternative within the same broader BHK catalogue.