Power amplifiers stereo — Parasound HALO A31

The HALO A31 is a stereo power amplifier from Parasound, sharing the Halo series' extraordinary damping factor with a somewhat different connectivity configuration. The HALO A31 brings Parasound's considered engineering to dedicated stereo power amplification.

Key specs that matter

Input sensitivity is 1,000mV, with input impedance at a substantial 94,000 ohms balanced or 47,000 ohms single-ended. Output power is 250W into 8 ohms, rising to 400W into 4 ohms. Frequency response spans a wide 5Hz to 100,000Hz within plus-or-minus 3dB. Signal-to-noise ratio is 112dB, with total harmonic distortion plus noise under 0.2% at 100% global feedback. Damping factor exceeds an extraordinary 1,100. At 445 x 178 x 485mm and 29.5kg, the HALO A31 maintains a substantial power amplifier chassis reflecting Parasound's celebrated Halo-series engineering.

Sound and use context

Expect exceptionally clean, tightly controlled amplification reflecting the extraordinary over-1,100 damping factor combined with the strong 112dB signal-to-noise figure.

Pairing

The extraordinary over-1,100 damping factor suits demanding loudspeaker loads with excellent bass control.

Alternatives

Parasound's own HALO A51 offers a closely related model within the same broader Halo power amplifier catalogue.