Integrated Amp Reviews

Two channels driven continuously into 8-ohm loads:
0.1% distortion at 77.0 watts
1% distortion at 89.9 watts

Two channels driven continuously into 4-ohm loads:
0.1% distortion at 150.6 watts
1% distortion at 165.2 watts

Analog frequency response:
–0.81 dB at 10 Hz
–0.23 dB at 20 Hz
+0.12 dB at 20 kHz
–2.21 dB at 50 kHz.

Analog frequency response w/processing:
–1.19 dB at 10 Hz
–0.34 dB at 20 Hz
+0.13dB at 20 kHz
–2.22 dB at 50 kHz.

48 kHz PCM frequency response:
–2.31 dB at 10 Hz
–0.66 dB at 20 Hz
–0.13 dB at 20 kHz
–1.01 dB at 24 kHz.

This graph shows that the A12’s left amplifier channel, with two channels driving 8-ohm loads, reaches 0.1% distortion at 77.0 watts and 1% distortion at 89.9 watts. Into 4 ohms, the amplifier reaches 0.1% distortion at 150.6 watts and 1% distortion at 165.2 watts.

THD+N from the amplifier was less than 0.015% at 1 kHz when driving 2.83 volts into an 8-ohm load. Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –63.17 dB left to right and –63.13 dB right to left. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –99.20 dBrA.—MJP