Can anyone please tell me what the difference in these numbers would indicate? Or what it all means?
Test Subject 1.
DOLBY DIGITAL PERFORMANCE
Output at clipping (1 kHz into 8/4 ohms)
1 channel driven: 151/224 watts* (21.8/23.5 dBW)*
5 channels driven (8 ohms): 56 watts (17.5 dBW)
6 channels driven (8 ohms): 53 watts (17.2 dBW)
Distortion at 1 watt (THD+N, 1 kHz)
8/4 ohms: 0.03/0.04%
Noise level (A-weighted): -76.3 dB
Excess noise (with sine tone)
16-bit (EN16): 0.9 dB
Frequency response: 20 Hz to 20 kHz +0, -0.15 dB
STEREO PERFORMANCE, DIGITAL INPUT
Reference level is -20 dBFS; all level trims at zero. Volume setting for reference level was -3 dB.
Output at clipping (1 kHz, 8/4 ohms, both channels driven): 99/137 watts* (20/21.4 dBW)*
Distortion at reference level: 0.03%
Linearity error (at -90 dBFS): 1.3 dB
Noise level (A-weighted): -76 dB
with 96-kHz/24-bit signals: -84.3 dB
Excess noise (with/without sine tone)
16-bit (EN16): 0.8/0.25 dB
quasi-20-bit (EN20): 12.2/11.7 dB
Noise modulation: 1.3 dB
Frequency response: 20 Hz to 20 kHz +0, -0.1 dB
with 96-kHz/24-bit signals: 20 Hz to 43 kHz +0, -3 dB
Test Subject 2
Output at clipping (1 kHz into 8/4 ohms)
1 channel driven: 144/217 W (21.6/23.4 dBW)
5 channels driven (8 ohms): 85 W* (19.3 dBW)*
7 channels driven (8 ohms): 80 W* (19 dBW)*
Distortion at 1 watt (THD+N, 1 kHz)
8/4 ohms: 0.02/0.03%
Noise level (A-wtd): -77.9 dB
Excess noise (with sine tone)
16-bit (EN16): 1 dB
Frequency response: 20 Hz to 20 kHz +0, -0.0 dB
STEREO PERFORMANCE, DIGITAL INPUT
Reference level is -20 dBFS; all level trims at zero. Volume setting for reference level was 78.
Output at clipping (1 kHz, 8/4 ohms, both channels driven): 124/175 W (20.9/22.4 dBW)
Distortion at reference level: 0.02%
Linearity error (at -90 dBFS): 0.0 dB
Noise level (A-wtd): -75.9 dB
with 96-kHz/24-bit signals: -87.7 dB
Excess noise (with/without sine tone)
16-bit (EN16): 0.8/0.8 dB
quasi-20-bit (EN20): 10.7/11.5 dB
Noise modulation: 1.2 dB
Frequency response:
Test Subject 1.
DOLBY DIGITAL PERFORMANCE
Output at clipping (1 kHz into 8/4 ohms)
1 channel driven: 151/224 watts* (21.8/23.5 dBW)*
5 channels driven (8 ohms): 56 watts (17.5 dBW)
6 channels driven (8 ohms): 53 watts (17.2 dBW)
Distortion at 1 watt (THD+N, 1 kHz)
8/4 ohms: 0.03/0.04%
Noise level (A-weighted): -76.3 dB
Excess noise (with sine tone)
16-bit (EN16): 0.9 dB
Frequency response: 20 Hz to 20 kHz +0, -0.15 dB
STEREO PERFORMANCE, DIGITAL INPUT
Reference level is -20 dBFS; all level trims at zero. Volume setting for reference level was -3 dB.
Output at clipping (1 kHz, 8/4 ohms, both channels driven): 99/137 watts* (20/21.4 dBW)*
Distortion at reference level: 0.03%
Linearity error (at -90 dBFS): 1.3 dB
Noise level (A-weighted): -76 dB
with 96-kHz/24-bit signals: -84.3 dB
Excess noise (with/without sine tone)
16-bit (EN16): 0.8/0.25 dB
quasi-20-bit (EN20): 12.2/11.7 dB
Noise modulation: 1.3 dB
Frequency response: 20 Hz to 20 kHz +0, -0.1 dB
with 96-kHz/24-bit signals: 20 Hz to 43 kHz +0, -3 dB
Test Subject 2
Output at clipping (1 kHz into 8/4 ohms)
1 channel driven: 144/217 W (21.6/23.4 dBW)
5 channels driven (8 ohms): 85 W* (19.3 dBW)*
7 channels driven (8 ohms): 80 W* (19 dBW)*
Distortion at 1 watt (THD+N, 1 kHz)
8/4 ohms: 0.02/0.03%
Noise level (A-wtd): -77.9 dB
Excess noise (with sine tone)
16-bit (EN16): 1 dB
Frequency response: 20 Hz to 20 kHz +0, -0.0 dB
STEREO PERFORMANCE, DIGITAL INPUT
Reference level is -20 dBFS; all level trims at zero. Volume setting for reference level was 78.
Output at clipping (1 kHz, 8/4 ohms, both channels driven): 124/175 W (20.9/22.4 dBW)
Distortion at reference level: 0.02%
Linearity error (at -90 dBFS): 0.0 dB
Noise level (A-wtd): -75.9 dB
with 96-kHz/24-bit signals: -87.7 dB
Excess noise (with/without sine tone)
16-bit (EN16): 0.8/0.8 dB
quasi-20-bit (EN20): 10.7/11.5 dB
Noise modulation: 1.2 dB
Frequency response: