Snell D7 Speaker System, Marantz SR9600 A/V Receiver, and Marantz DV9600 Disc Player HT Labs Measures: Marantz SR9600 Receiver
Five channels driven continuously into 8-ohm loads:
0.1% distortion at 126.4 watts
1% distortion at 146.7 watts
All channels driven continuously into 8-ohm loads:
0.1% distortion at 119.1 watts
1% distortion at 132.6 watts
Analog frequency response in Pure Direct mode:
–0.77 dB at 10 Hz; –0.22 dB at 20 Hz
–0.13 dB at 20 kHz; –0.80 dB at 50 kHz
Analog frequency response with signal processing:
–0.58 dB at 10 Hz; –0.18 dB at 20 Hz
–0.29 dB at 20 kHz; –50.67 dB at 50 kHz
This graph shows that the SR9600's left channel, from CD input to speaker output with two channels driving 8-ohm loads, reaches 0.1-percent distortion at 148.4 watts and 1-percent distortion at 185.7 watts. Into 4 ohms, the amplifier reaches 0.1-percent distortion at 242.1 watts and 1-percent distortion at 280.9 watts.
Response from the multichannel input to the speaker output in Pure Direct mode measures –0.28 dB at 10 Hz, –0.08 dB at 20 Hz, –0.14 dB at 20 kHz, and –0.86 dB at 50 kHz. THD+N from the amplifier was less than 0.009 percent 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 –95.44 dB left to right and –92.66 dB right to left. The signal-to-noise ratio with 2.83 volts driving an 8-ohm load from 10 Hz to 24 kHz with "A" weighting was –102.80 dBrA.
From the Dolby Digital input to the loudspeaker output, the left channel measures –0.08 dB at 20 Hz and –0.22 dB at 20 kHz. The center channel measures –0.09 dB at 20 Hz and –0.24 dB at 20 kHz, and the left surround channel measures –0.09 dB at 20 Hz and –0.23 dB at 20 kHz. From the Dolby Digital input to the line-level output, the LFE channel is –0.02 dB at 20 Hz when referenced to the level at 40 Hz and reaches the upper 3-dB down point at 119 Hz and the upper 6-dB down point at 123 Hz.—MJP