Integrated Amp Reviews

Two channels driven continuously into 8-ohm loads:
0.2% distortion at 49.1 watts
1% distortion at 61.2 watts

Two channels driven continuously into 4-ohm loads:
0.2% distortion at 73.4 watts
1% distortion at 94.5 watts

Analog frequency response:
+0.79 dB at 10 Hz
+1.66 dB at 20 Hz
+2.94 dB at 20 kHz
–62.13 dB at 50 kHz.

48 kHz PCM frequency response:
+1.25 dB at 10 Hz
+1.84 dB at 20 Hz
+0.71 dB at 20 kHz
+0.57 dB at 24 kHz.

This graph shows that the WXA-50’s left amplifier channel, with two channels driving 8-ohm loads, reaches 0.2% distortion at 49.1 watts and 1% distortion at 61.2 watts. Into 4 ohms, the amplifier reaches 0.2% distortion at 73.4 watts and 1% distortion at 94.5 watts.

THD+N from the amplifier was less than 0.174% 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 –95.27 dB left to right and –94.00 dB right to left. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –94.83 dBrA.—MJP