NAD T 187, Service Manual, Page: 4 / 85

4
SPECIFICATIONS
PRE AMPLIFIER SECTION
Rated distortion (Ext 7.1 1kHz 500mV input ,Pre-out 1V with 30kHz LPF, FL/C/FR) ≤ 0.1 %
(Ext 7.1 1kHz 500mV input ,Pre-out 1V with 30kHz LPF, SL/SR/BL/BR)
≤ 0.1 %
S/N Ratio (Ext 7.1 1kHz 500mV input ,Pre-out 1V with A-WTD, 1kΩ termination, ≥ - 85 dB
FL/C/FR/SL/SR/BL/BR)
Frequency Response (20 Hz - 20 kHz)
0 ± 1.0 dB
Channel Balance (1 dB to -40 dB, 1 kHz) ≤ 2 dB
(-41 dB to -50 dB, 1 kHz) ≤ 3 dB
Audio muting at 1 kHz ≥ 55 dB
Subwoofer out, 500 mV in (THD at 2V Pre-out, 100 Hz)
≤ 0.5 %
(S/N at 2V Pre-out, 100 Hz) ≥ 70 dB
(Min. Vol. hum. 47 k Ω w/o filter) ≥ -56 dBV
(Ext. 7.1 in 6 CH A-wtd)
≥ -65 dBV
Crosstalk (500 mV input, ref @ 1V out, 1 kHz)
≥ -60 dB
Controls
Bass (at 500 mV in, ref @ 1V out, 100 Hz)
± 10 dB ± 2
Treble (at 500 mV in, ref @ 1V out, 100 Hz) ± 10 dB ± 2
Dialog (Vol. set at ± 6 dB, 2 kHz) ± 4 dB ± 1
DOLBY DIGITAL SECTION
Channel Difference (FL ref. Track 30) ± 1.2 dB
Frequency Resporse at Dolby config.2 SL Track 46 200 - 20 kHz
± 0.8 dB
SR Track 47 200 - 20 kHz
± 0.8 dB
C Track 44 200 - 20 kHz ± 0.8 dB
Harmonic Distortion (1 V, Audio LPF, Dolby Config 1) FL Track 65 997 Hz ≤ 0.08 %
FR Track 67 997 Hz
≤ 0.08 %
SL Track 68 997 Hz ≤ 0.08 %
SR Track 69 997 Hz ≤ 0.08 %
C Track 66 997 Hz
≤ 0.08 %
S/N Ratio (31 for 100mV @ Pre-out, Track 35) CCIR / ARM
≥ 65 dB
Audio LPF ≥ 70 dB
A-wtd ≥ 70 dB
DOLBY PRO LOGIC II SECTION
Frequency Response
I/P mode : L, R : 1 V in, 1V @ Pre-out, Ch L/R 40 Hz
0 ± 2.0 dB
20 kHz 0 ± 2.0 dB
I/P mode : L=R : 1 V in, 1V @ Pre-out, Ch /L/R 40 Hz 0 ± 2.0 dB
Ch C 20 kHz
0 ± 2.0 dB
I/P mode : L=-R : 1 V in, 1V @ Pre-out, Ch SL/SR 40 Hz
0 ± 2.0 dB
20 kHz 0 ± 2.0 dB
S/N Ratio (200 mV in, 100mV @ Pre-out, A-WTD w/ 1 kΩ termination)
I/P mode : L, R : 1 kHz, Ch L/R
≥ 65 dB
I/P mode : L=R : 1 kHz, Ch C ≥ 65 dB
I/P mode : L=-R : 1 kHz, Ch SL/SR ≥ 65 dB
THD (2.2 V in, 100mV @ Pre-out, w/ 80 kHz LPF, 1kHz)
≤ 0.2 %
MAX VOL PLII Music mode, 1kHz, 1Vp-p, CD in,
≥ 40 dB
NOISE connect to T787 Ext 7.1, measure at T787
Spk out, with ref. to 1W S/N (L,R,C,SL,SR)