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TRIO KA-4000

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Technic details

Specifications

Type:
Pre-main amplifier
[Power amplifier section]
Rated output:
40W / 40W (8Ω, distortion 0.5%)
Music power:
120W (4Ω, distortion 0.8%)
100 W (8 Ω, distortion 0.8%)
Frequency characteristic:
15Hz to 60kHz, ±0.5dB

Output band characteristic:
10Hz to 60kHz, -3dB (Distortion 0.5%)
Distortion factor (1 kHz, 8 Ω load):
0.1% (35 W / 35 W)
0.05% (20W / 20W)
0.1% (300mW / 300mW)
Intermodulation distortion ratio (60Hz: 70kHz, 8Ω load):
0.2% (35W / 35W)
0.08% (10W / 10W)
Residual noise:
0.5mV
Damping factor:
30 (8Ω)
60 (16Ω)
[Preamp part]
Input sensitivity / impedance:
Phono 1, 2 - 2mV / 100kΩ
Tape HD - 2mV / 100kΩ
MIC - 2mV / 100kΩ
AUX, Tuner, Tape Play - 200mV / 100kΩ
Tone control:
Bass - 100Hz, ±10dB
Treble - 10kHz, ±10dB
Loudness control:
+6dB (100Hz)
+2dB (10kHz)
Filters:
Low filter - 80Hz, -12dB / oct.
High filter - 8kHz, -12dB / oct.
Within ± 0.2dB with respect to the equalizer RIAA NAB standard curve
Signal to noise ratio:
Phono 1, 2 - 70dB
Tape HD, MIC - 70dB
Tuner, AUX, Tape Play - 80dB
Attached circuit:
Audio muting switch
Pre-Main jumper circuit
DIN standard re-connector
Tape monitor switch
2 speaker switch
Semiconductors used:
Transistors - 30 pieces
Diodes - 6 pieces

Power supply voltage:
AC100 / 117V, 50 / 60Hz
Power consumption:
No signal - 13W
Maximum output - 180W
Dimensions (W x H x D):
408 x 134 x 280mm
Weight:
8kg
Year:
Around 1968

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