AV Receiver Reviews

Two channels driven continuously into 8-ohm loads:
0.1% distortion at 111.7 watts
1% distortion at 129.8 watts

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 72.9 watts
1% distortion at 88.7 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 68.5 watts
1% distortion at 81.0 watts

Analog frequency response in Pure Direct mode:
–0.16 dB at 10 Hz
–0.04 dB at 20 Hz
+0.02 dB at 20 kHz
–2.74 dB at 50 kHz.

Analog frequency response with signal processing:
–0.32 dB at 10 Hz
–0.10 dB at 20 Hz
–0.03 dB at 20 kHz
–61.06 dB at 50 kHz.

This graph shows that the SR5009’s left channel, from CD input to speaker output with two channels driving 8-ohm loads, reaches 0.1% distortion at 111.7 watts and 1% distortion at 129.8 watts. Into 4 ohms, the amplifier reaches 0.1% distortion at 182.7 watts and 1% distortion at 203.9 watts.

Response from the multichannel input to the speaker output measures –0.16 dB at 10 Hz, –0.04 dB at 20 Hz, +0.01 dB at 20 kHz, and –2.76 dB at 50 kHz. THD+N from the CD input to the speaker output was less than 0.009% 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 –83.16 dB left to right and –87.25 dB right to left. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –103.74 dBrA.

From the Dolby Digital input to the loudspeaker output, the left channel measures –0.04 dB at 20 Hz and –0.07 dB at 20 kHz. The center channel measures –0.04 dB at 20 Hz and –0.08 dB at 20 kHz, and the left surround channel measures –0.04 dB at 20 Hz and –0.10 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 109 Hz and the upper 6-dB down point at 117 Hz.—MJP