AV Receiver Reviews

Two channels driven continuously into 8-ohm loads:
0.1% distortion at 118.5 watts
1% distortion at 138.2 watts

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 102.4 watts
1% distortion at 114.8 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 75.2 watts
1% distortion at 90.1 watts

Analog frequency response without signal processing:
–0.08 dB at 10 Hz
–0.02 dB at 20 Hz
+0.08 dB at 20 kHz
–2.49 dB at 50 kHz

Analog frequency response with signal processing:
–0.47 dB at 10 Hz
–0.13 dB at 20 Hz
–0.02 dB at 20 kHz
–33.10 dB at 50 kHz

This graph shows that the MRX 710’s left channel, from Analog 1 input to speaker output with two channels driving 8-ohm loads, reaches 0.1% distortion at 118.5 watts and 1% distortion at 138.2 watts. Into 4 ohms, the amplifier reaches 0.1% distortion at 187.8 watts and 1% distortion at 223.3 watts.

There was no multichannel input to measure. THD+N from the Analog 1 input to the speaker output was less than 0.012% 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 –84.06 dB left to right and –83.64 dB right to left. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –107.73 dBrA.

From the Dolby Digital input to the loudspeaker output, the left channel measures –0.02 dB at 20 Hz and +0.07 dB at 20 kHz. The center channel measures –0.02 dB at 20 Hz and –0.06 dB at 20 kHz, and the left surround channel measures –0.02 dB at 20 Hz and +0.02 dB at 20 kHz. From the Dolby Digital input to the line-level output, the LFE channel is –0.01 dB at 20 Hz when referenced to the level at 40 Hz and reaches the upper 3-dB down point at 117 Hz and the upper 6-dB down point at 120 Hz.—MJP