NAD 7250PE - Page 5

PREAMPLIFIER
SECTION
PHONO INPUT
Input
impedance
Input
sensitivity
(ref.
1
watt)
Input overload at 20 Hz/1 kHz/20 kHz
THD (20 Hz — 20 kHz) and IM Dist. at +30 dB level
RIAA response accuracy
S/N ratio, IHF A-weighted, with cartridge connected
LINE
LEVEL
INPUT
(AUX,
TAPE)
Input
impedance
Input
sensitivity
Maximum
input
signal
Signal
to
noise
ratio,
A-weighted
Frequency
response,
20
Hz
—
20
kHz
OUTPUTS
Preamp
out
impedance
Maximum
output
level
Tape
output
impedance
Tape
output
infrasonic
filter
CONTROLS
Treble
Bass
Speaker Equalization
Infrasonic
filter
(switchable)
Audio muting (low level)
R = 47 kQ; C = 100 pF
0.4 mV
18 mV/170 mV/1.5 V
<0.04
%
+0.5
dB
76
dB
re5
mV
R = 10 kQ; C = 220 pF
25 mV for 1 W out
150
mV
for
50
W
out
>10V
85 dB re 1W
> 100 GB ref. rated power
+0.5
dB
800 ohms
10 V
1,000 ohms (buffered)
—3 dB at 15 Hz, 12 dB/octave
+7 dB at 10 kHz
+7
dB
at
100
Hz
+3 dB at 70 Hz, +6 dB at 32 Hz
—3 dB at 15 Hz, 12 dB/octave
—20 dB