NAD C 425 Service Manual - Specifications
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SPECIFICATIONS
AM TUNER SECTION
Input level is expressed as the reading in open-circuit
of 75-ohm source impedance signal generator
Usable Sensitivity (999/1000kHz) ≤30dBµ
S/N Ratio (5mV in) ≥38dB
THD (5mV in) ≤3%
IF Rejection (450kHz) ≥36dB
Image Rejection (F+2xIF) ≥28dB
Selectivity ≥17dB
Output 130 +/-20mV
Loop Sensitivity (20dB S/N)
999/1000 kHz ≤66 dB
603/600 kHz ≤66 dB
1404/1400 kHz ≤66 dB
Frequency response (100 - 2.3 kHz, 5mV) ±6 dB
FM TUNER SECTION *C
*AH
Input level is expressed as the reading in open-circuit
of 75-ohm source impedance signal generator
Usable Sensitivity (98 MHz) ≤13 dBµ ≤13 dBµ
Signal / Noise Ratio Mono ≥72 dB ≥72 dB
(60 dBµ, IHF wtd) Stereo ≥66 dB ≥66 dB
Frequency Response (20 Hz - 15 kHz, 60 dBµ) 0±1.0 dB 0±1.0 dB
Channel Separation (60 dBµ) 30 Hz ≥33 dB ≥33 dB
1 kHz ≥42 dB ≥42 dB
10 kHz ≥32 dB ≥32 dB
Alternate Channel Sensitivity
(40 dBµ, ±400 kHz) ≥60 dB ≥45 dB
Capture Ratio (40 dBµ) ≤3 dB ≤3 dB
AM Suppression
(60 dBµ, 100% Mod.FM, 30% Mod AM) ≥65 dB ≥65 dB
Image Rejection (119.4 MHz) ≥85 dB ≥85 dB
I.F. Rejection (10.7 MHz) ≥78 dB ≥78 dB
Pilot Suppression (60 dBµ) ≥60 dB ≥60 dB
THD (60 dBµ, L=R 75 kHz for AH, 40 kHz Dev for C)
Mono ≤0.25% ≤0.25%
Stereo ≤0.35% ≤0.35%
Auto-Search sensitivity On ≥24 dBµ ≥24 dBµ
Off ≤15 dBµ ≤15 dBµ
RDS Decode Sensitivity ≤26 dBµ ≤26 dBµ
PHYSICAL SPECIFICATIONS
Dimensions (Width x Height x Depth) 435 x 80 x 285 mm
Net weight 4 kg (8.8 lbs)
Shipping weight 5.1 kg (11.22 lbs)