Surround Processor Reviews

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 169.3 watts
1% distortion at 182.3 watts

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 173.5 watts
1% distortion at 188.2 watts

Frequency response with RCA input:
–0.04 dB at 10 Hz
–0.01 dB at 20 Hz
–0.03 dB at 20 kHz
–2.98 dB at 50 kHz

Frequency response with XLR input:
–0.07 dB at 10 Hz
&br;0.01 dB at 20 Hz
–0.12 dB at 20 kHz
–3.15 dB at 50 kHz

This graph shows that the POA-A1HDCI’s left amplifier channel, with two channels driving 8-ohm loads, reaches 0.1 precent distortion at 179.8 watts and 1 percent distortion at 197.2 watts. Into 4 ohms, the amplifier reaches 0.1 percent distortion at 268.5 watts and 1 percent distortion at 318 watts. An input level of 103 millivolts was required to produce an output of 2.83 volts into an 8-ohm load, indicat- ing an overall gain of +28.80 decibels using the RCA input. When using the XLR input, a level of 208 millivolts was required to produce an output of 2.83 volts into an 8-ohm load, indicat- ing an overall gain of +22.69 dB.

THD+N from the amplifier was less than 0.002 percent at 1 kilohertz when driving 2.83 volts into an 8-ohm load using the RCA input. When using the XLR input under the same conditions, THD+N was less than 0.002 percent. Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –111.95 dB left to right and –110.75 dB right to left using the RCA inputs and –110.11 dB left to right and –111.55 dB right to left using the XLR inputs. The signal-to-noise ratio with 2.83 volts driving an 8-ohm load from 10 hertz to 24 kHz with “A” weighting was –114.05 dBrA using the RCA input and –114.57 using the XLR input. —MJP