AUDIO POWER SPECIFICATIONS POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 8 ohm loads, both channels driven, from 20 – 20,000 Hz; rated 100 watts per channel minimum RMS power, with no more than 0.09 % total harmonic distortion from 250 milliwatts to rated output (Models of area code U only). Amplifier section POWER OUTPUT Models of area code U, CA Rated Power Output at Stereo Mode (8 ohms 20 Hz – 20 kHz, THD 0.09 %) 100 W + 100 W (4 ohms 20 Hz – 20 kHz, THD 0.09 %) 90 W + 90 W Reference Power Output (8 ohms 20 Hz – 20 kHz, THD 0.09 %) STR-DB1070: FRONT1):100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W SURR BACK1): 100 W STR-DB870: FRONT1): 100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W (4 ohms 20 Hz – 20 kHz, THD 0.09 %) STR-DB1070: FRONT:1) 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W SURR BACK1): 90 W STR-DB870: FRONT1):90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W SPECIFICATIONS Models of other area code Rated Power Output at Stereo Mode (8 ohms 1 kHz, THD 0.7 %) STR-DB1070: 100 W + 100 W2) 90 W + 90 W3) STR-DB870: 100 W + 100 W2) (4 ohms 1 kHz, THD 0.7 %) STR-DB1070: 90 W + 90 W2) 80 W + 80 W3) STR-DB870: 100 W + 100 W2) Reference Power Output2) (8 ohms 1 kHz, THD 0.7 %) STR-DB1070: FRONT 1): 100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W SURR BACK1): 100 W STR-DB870: FRONT 1): 100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W (4 ohms 1 kHz, THD 0.7 %) STR-DB1070: FRONT 1): 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W SURR BACK1): 90 W STR-DB870: FRONT 1): 100 W + 100 W CENTER1): 100 W SURR1): 100 W + 100 W (8 ohms 20 Hz – 20 kHz, THD 0.09 %) STR-DB1070: FRONT 1): 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W SURR BACK1): 90 W STR-DB870: FRONT 1): 90 W + 90 W CENTER1): 90 W SURR1): 90 W + 90 W