Soundsmith HE150 Power Amplifier

Soundsmith HE150 power amp


Designed to partner the Strain Gauge series, this 150 W/channel RMS power amplifier has a distinctivel specification and exceptional sonic performance.

Zero feeback MOSFET design

◆ High bias class AB operation

Sonically, this amp provides effortless power and is the closest we have heard to capturing all that's good about "valve" sound from a solid state amplifier.

Full specification


Continuous average power output (per channel) 150 W (into 8 ohns, 20-20,000 Hz, THD < 0.05%)

Frequency response 20-20,000 Hz +0/-0.1 dB

Output impedance (20-20,000 Hz): typical 0.04 ohm

Wideband damping factor:
typical 200

SMPTE intermodulation distortion: typical 0.05%

IHF intermodulation distortion: typical 0.05%S

Slew rate: 250 V/μ

Channel separation > 75 dB

Continuous average power output into 4 ohm (per channel): 225 W

Frequency range at 1 Watt: +0/-0.2 dB, 0.1 Hz - 1.5 MHz

Sensitivity (1 W/8 ohms/1 kHz): 800 mV

A-weighted signal to noise ration (Ref 1 W/8 ohms): 94 dB

Pulse power: 1250 W into 0.5 ohm

Power consumption: 50 to 770 W

Price POA