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Technics SU-40A

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Technic details

Specifications

Type:
Tube main amplifier
Music power:
30W+30W (16 ohms, 0.1% or less of a distortion, 1kHz)
28W+28W (8 ohms, 0.1% or less of a distortion, 1kHz)
26W+26W (4 ohms, 0.15% or less of distortion)
Output power:
25W/25W (16 ohms, 0.1% or less of a distortion, 1kHz)
24W/24W (8 ohms, 0.1% or less of distortion)
22W/22W (4 ohms, 0.15% or less of distortion)
Frequency characteristic:
4Hz - 50kHz, +0 -3dB (At the time of 10W output

S / N ratio (A curve):
Input short-circuit - 103dB
Input Open - 92dB
Input sensitivity:
170mV (4 ohms)
160mV (8 ohms)
150mV (16 ohms)
Input impedance:
100 kohms
Dumping factor:
-3 to ∞ to + 0.5 (Continuously variable)
Switchable between all frequency bands (10 Hz to 20 kHz) and 500 Hz or less (10 to 200 Hz)
Filters:
Low cut filter - 15Hz, -6dB / oct.
[The semiconductor used]
Vacuum tubes:
6267 - 2 pieces
12AT7 - 2 pieces
50HB26 - 4 pieces
Diodes:
5 pieces
Power source:
AC 100V, 50/60Hz
Power consumption:
At the time of a non-signal - 85VA
At the time of 25Wx2 output - 145VA

Dimensions (W x H x D):
360 x 150 x 330mm
Weight:
14.8kg
Year:
1968

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