AV Receiver Reviews

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 71.4 watts
1% distortion at 83.4 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 56.3 watts
1% distortion at 70.9 watts

Analog frequency response in Stereo mode:
–0.67 dB at 10 Hz
–0.21 dB at 20 Hz
+0.07 dB at 20 kHz
–27.28 dB at 50 kHz

Analog frequency response with stereo signal processing:
–0.66 dB at 10 Hz
–0.21 dB at 20 Hz
+0.07 dB at 20 kHz
–27.26 dB at 50 kHz

This graph shows that the MRX 300’s left channel, from CD input to speaker output with two channels driving 8-ohm loads, reaches 0.1 percent distortion at 93.2 watts and 1 percent distortion at 116.3 watts. Into 4 ohms, the amplifier reaches 0.1 percent distortion at 136.5 watts and 1 percent distortion at 165.9 watts.

There was no multichannel input to measure. THD+N from the CD input to the speaker output was less than 0.030 percent at 1 kilohertz when driving 2.83 volts into an 8-ohm load. Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –72.23 decibels left to right and –71.65 dB right to left. The signal-to-noise ratio with an 8-ohm load from 10 hertz to 24 kHz with “A” weighting was –101.03 dBrA.

From the Dolby Digital input to the loudspeaker output, the left channel measures –0.07 dB at 20 Hz and +0.10 dB at 20 kHz. The center channel measures –0.08 dB at 20 Hz and +0.12 dB at 20 kHz, and the left surround channel measures –0.08 dB at 20 Hz and +0.09 dB at 20 kHz. From the Dolby Digital input to the line-level output, the LFE channel is +0.50 dB at 20 Hz when referenced to the level at 40 Hz and reaches the upper 3-dB down point at 67 Hz and the upper 6-dB down point at 81 Hz.—MJP

Video Test Bench
The Anthem passed most of our digital tests cleanly, although there was significant rolloff in its chroma (color) resolution. This was visible on our highest-frequency HD burst pattern at 1080p. Previous experience suggests that this shortcoming is unlikely to be obvious on typical program material. The Anthem’s analog test results, which check for cross-conversion from a component input to an HDMI output, were above average. But the A/V receiver did fail both analog chroma resolution and analog video clipping; in the latter, it clipped both above white and below black.—TJN