Marantz $1800 SR7007...two channels driving 8-ohm loads, reaches 1 percent distortion at 143.2 watts. Into 4 ohms, the amplifier reaches 1 percent distortion at 225.4 watts.
Response from the multichan- nel input to the speaker output measures –0.15 decibels at 10 hertz, –0.04 dB at 20 Hz, –0.10 dB at 20 kilohertz, and –3.33 dB at 50 kHz. THD+N from the CD input to the speaker output was less than 0.010 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 –76.65 dB left to right and –76.77 dB right to left. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –98.75 dBrA.
Marantz SR7007 A/V Receiver HT Labs Measures | Home Theater
Denon $1100 AVR-3312CI... two channels driving 8-ohm loads, reaches 1 percent distortion at 143.3 watts. Into 4 ohms, the amplifier reaches 1 percent distortion at 225.5 watts.
There was no multichannel input to measure. THD+N from the CD input to the speaker output was less than 0.005 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 –77.40 dB left to right and –77.93 dB right to left. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –108.68 dBrA.
Denon AVR-3312CI A/V Receiver | Home Theater
Yet, the Marantz gets 5 stars audio performance, while the cheaper Denon gets 4 stars.