NAD C 725BEE, Service Manual

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SPECIFICATIONS
POWER AMPLIFIER SECTION
STEREO MODE
CONTINUOUS AVERAGE POWER 50 W (17 dBW)
OUTPUT INTO 8 OHMS OR 4 OHMS
(Min. power per channel, 20 Hz – 20 kHz,
with no more than rated distortion)
Rated Distortion 0.03%
(THD 20 Hz – 20 kHz)
Clipping power 52 W
(maximum continuous power per channel 4 and 8).
IHF dynamic headroom: at 8 ohms + 2.4 dB
at 4 ohms + 4.4 dB
IHF dynamic power
(maximum short term power per channel)
8 ohms: 160 W (20.4 dBW)
4 ohms: 220 W (22.0 dBW)
2 ohms: 270 W (2 3 .2 dBW)
Damping factor > 100
(ref. 8 ohms 1 kHz)
Input Impedance R = 20 kohms
C = 1 nF
Input sensitivity (for rated output into 8 ohms) 780 mV
Voltage gain 29 dB
Frequency response 20 Hz – 20 kH 0.1 dB
Signal / Noise ratio, A-weighted 100 dB ref. 1 W
119 dB ref. 50 W
THD + Noise < 0.03%
(Total Harmonic Distortion, 20 Hz – 20 kHz,
from 250 mW to rated output)
SMPTE I.M. < 0.01%
(Intermodulation Distortion, 60 Hz + 7 kHz, 4:1,
from 250 mW to rated output)
IHF I.M. < 0.01%
(CCIF IM Distortion, 19 + 20 kHz at rated output)
Headphones Output Impedance 220 ohms