Усилитель Pioneer M-77 и C-77

Япония, 100 вольт, самое начало восьмидесятых годов. Косметически и технически в очень хорошем состоянии.

С-77
Type Stereo preamplifier
Circuit system Equalizer amplifier : first stage differential 3-stage direct connection, last stage A-class SEPP
Control amplifier section : first stage differential 3-stage direct connection final stage A class SEPP
Input terminal Phono1 : 2.5mV/50k Ω
Phono2 : 2.5 mV to 10mV/50k Ω
MIC : 2.5mV/50k Ω
Tuner, AUX1, 2 : 150mV/100k Ω
Tape Play1, 2 : 150mV/100k Ω
Phono maximum allowable input
(Harmonic distortion rate 0.05%, 1 kHz) Phono1:500mV
Phono2 : 500 mV to 1000 mV
Output terminal Tape Rec1, 2 : 150mV/2.2k Ω
Output (RL : 50k Ω) : 2V/600 Ω, 7V/600 Ω
Harmonic distortion factor (20 Hz to 20 kHz) 0.03% (2 v Output)
0.05% (7 v Output)
Frequency characteristic Phono1, 2 : 20 Hz to 20 kHz ± 0.2 dB
Tuner, AUX, TapePlay : 10 hz to 70 khz + 0 to 0.5 db
Signal-to-noise ratio (IHF, A-network
Short circuit) Phono:74dB
Tuner, AUX, TapePlay : 90 dB
Tone control
(1.5 dB step)
Bass Main : ± 7.5 dB (100 Hz)
Sub : ± 4.5 dB (50 Hz)
Treble Main : ± 7.5 dB (10 kHz)
Sub : ± 4.5 dB (20 kHz)
Filter Low : 15 Hz, 30 Hz (12dB/oct.)
High : 12 kHz, 8 kHz (12dB/oct.)
Attenuator 0, -15, -30dB
Semiconductor used IC : 2
Transistor : 50
Diode, Other : 31
Power supply voltage 100 V, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law) 17W
External dimensions Width 480x Height 186.5x Depth 365 mm
Weight 11.2kg
EIU standard rack mounting unit 4U

М-77
Type Stereo power amplifier
Circuit system First stage cascade connection differential amplification triple push-pull
Pure complimentary service OCL circuit
Effective power
(Both channel drive, 20 Hz to 20 kHz) 250W + 250W (4 Ω)
250W + 250W (8 Ω)
Harmonic distortion factor (20 Hz to 20 kHz) Effective power : 0.1%
0.05% at 125W output (8 Ω)
1W output (8 Ω) : 0.05%
Cross modulation distortion factor
(50 Hz : 7 kHz = 4 : 1, 8 Ω) Effective power : 0.1%
0.05% at 125W output
0.05% at 1W output
Output Bandwidth (IHF, both channel drives) 5 Hz ~ 30 kHz (Distortion Factor 0.1%)
Frequency characteristic 5 Hz to 80 kHz + 0 -1dB
Input terminal Input : 2V/50k Ω
Output terminal Speaker : 4 Ω, 8 Ω
Damping factor 50 (20 Hz ~ 20 kHz, 8 Ω)
Signal-to-noise ratio 110 dB (IHF, A-network, short circuit)
Semiconductor used Transistor : 55
Diode, Other : 81
Power supply voltage 100 V, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law) 450W
Maximum Power Consumption 1200W
External dimensions Width 480x Height 186.5x Depth 445 mm
Weight 24.3kg
EIA standard rack mounting unit 4U