Nakamichi SR-4E - Specifications; Power Amplifier Section; Preamplifier Section

Specifications
Power Amplifier Section
Note: Unless noted otherwise, specifications are in accordance with IHF-A-202
measured from any high-level input (CD/VIDEO/TAPE) to the speaker output.
Continuous Average Output Power
SR-4E (German Model)
SR-3E
SR-2E
NR
60
watts
per
channel
into
8
ohms,
45
watts
per
channel
into
8
ohms,
30
watts
per
channel
into
8
chms,
both
channels
driven,
20—20,000
both
channels
driven,
20—20,000
both
channels
driven,
20—20,000
Hz at no greater than 0.1% THD
Hz, at no greater than 0.1% THD
Hz, at no greater than 0.1% THD
Dynamic Output Power
85 watts per channel into 8 ohms
125 watts per channel into 4 ohms
64 watts per channel into 8 ohms
80 watts per channel into 4 ohms
45 watts per channel into 8 ohms
55 watts per channel into 4 ohms
Dynamic Head Room (8 ohms)
15 dB
1.5 dB
1.7 dB
Power Bandwidth
5—30,000 Hz
5—40,000 Hz
*5—30,000 Hz
5—40,000 Hz
* 5—30,000 Hz
Frequency Response
20—20,000 Hz; +0, —1 dB
5—45,000 Hz; +0, —3 dB
20—20,000 Hz; +0, —0.5 dB
5—75,000 Hz; +0, -3 dB
* 20—20,000 Hz; +0, —1 dB
* 5—45,000 Hz; +0, —3 dB
20—20,000 Hz: +0, —0.5 dB
5—75,000 Hz; +0, —3 dB
* 20—20,000 Hz: +0, —1 dB
* 5—45,000 Hz: +0, —3 dB
Signal-to-Noise Ratio
(A-WTD, input shorted)
Better than 105 dB re Rated Power
Better than 85 dB (IHF-A-202)
Better than 105 dB re rated power
Better than 85 dB (IHF-A-202)
Better than 105 dB re rated power
Better than 85 dB (IHF-A-202)
Total Harmonic Distortion
(8 ohms, rated power, 20 Hz—20 kHz)
Less than 01%
Less than 01%
Less than 0.1%
Intermodulation Distortion
9X 9 of
(B
ohms,
rated
power,
60
Hz:7
kHz,
4:1)
Less
than
01%
Less
than
015%
Less
than
0.15%
Headphone
Rated
Output
(40
ohms)
140
mW
105
mW
70
mw
Output
Current
Capability
25
A
peak
per
channel
18
A
peak
per
channel
14
A
peak
per
channel
Preamplifier Section
Note: Unless noted otherwise, specifications are in accordance with IHF-A-202. Except for
sensitivity, S/N, tone control and loudness characteristics (which are measured to the
speaker outputs), measurements are made from the specified input to Rec Out.
SR-4E (German Model) SR-3E SR-2E
Sensitivity (for rated output)
Phono
MC
(gain:
32/24
dB)
60/160
LV
60/160
wV
_
Phono
MM
2.5
mV
2.5
mV
25mV
CD/Tape
200
mV
200
mV
200
mV
Video
200
mV
200
mV
_
Sensitivity
(for
1-watt
output,
IHF-A-202)
Phono MC (gain: 32/24 dB) 7.8/21 wV 8.9/24 pV -
Phono
MM
0.32
mV
0.37
mV
0.46
mV
CD/Tape
26
mV
30
mV
37
mV
Video 26 mV 30 mV _
Input Impedance
Phono
MC
100
ohms
100
ohms
-
Phono
MM
47
kohms
47
kohms
47
kohms
CD/Tape 20 kohms 20 kohms 20 kohms
Video
20
kohms
20
kohms
-
Maximum
Input Level
(1 kHz)
Phono MC (gain: 32/24 dB) 3/8 mV 3/8 mV _
Phono MM 140 mV 140 mV 140 mV
Record Output Level/impedance
Total Harmonic Distortion (1 kHz, to Rec Out, at 1 V)
200 mV/1 kohms
200 mV/1 kohms
200 mV/1 kohms
Phono MC Less than 0.003% (either gain) Less than 0.003% (either gain) _
Phono MM Less than 0.002% Less than 0.002% Less than 0.002%
RIAA Deviation
Phono MC 30—20,000 Hz +0.5 dB 30—20,000 Hz +0.5 dB _
Phono MM 30—20,000 Hz +0.5 dB 30—20,000 Hz +0.5 dB 30—20,000 Hz +0.5 dB
Signal-to-Noise Ratio (to speaker output, IHF-A-202)
Phono MC with 32 dB Gain
Better than 71 dB
Better than 73 dB
* Better than 71 dB
24 dB Gain Better than 70 dB Better than 72 dB -
* Better than 70 dB -
Phono MM Better than 78 dB Better than 80 dB Better than 80 dB
* Better than 78 dB * Better than 78 dB
Tone Controls
Bass 20 Hz, +10 dB 20 Hz, +10 dB 20 Hz, +10 dB
Treble 20 kHz, +10 dB 20 kHz, +10 dB
Variable Loudness
(re maximum attenuation: —40 dB at 1 kHz)
20 Hz, +20 dB; 20 kHz, +6 dB
Loudness (volume: -30 dB)
20 kHz, +10 dB
20 Hz, +10 dB; 20 kHz, +6 dB
Subsonic Filter (Phono only)
28
20 Hz, +10 dB; 20 kHz, +6 dB
Cutoff Frequency 20 Hz, —12 dB/octave Cutoff Frequency 20 Hz, ~12 dB/octave —