Technics SE-A3MK2

Commentary

New class A stereo power amplifier with a computer drive.

By installing a computer drive circuit and introducing a microcomputer into the bias control of the signal system, transient distortion of the output stage is eliminated in real time, and high power low distortion rate is realized.

Equipped with a plug-in power block, the output stage and power supply part are integrated with an ingenious structure to eliminate electromagnetic radiation that causes high-frequency distortion.

The power supply is equipped with a 400 VA transformer for each channel and two 22,000 μ F (105 v) high-capacity capacitors. This fully monaural construction reduces interference between the two channels.

The final stage is a 4-stage Darlington configuration using a Pc200W high-voltage transistor with 4-para connection and realizes high power.

Equipped with a large peak power meter with high precision and instantaneous response, it can read directly from 0.0001W minute output to 1W without switching the meter range.

Computer control is also used in purely electronic protective circuits to improve safety.

Model Rating

Type	Stereo DC power amplifier
Effective power	300W + 300W (8 ω, 20 Hz-20 kHz, 0.002%)
Total harmonic distortion factor	0.001% or Less (20 Hz to 20 kHz, Rated Output -3dB)
TIM	Unmeasurable
Output bandwidth	5 Hz ~ 100 kHz (THD 0.007%)
Frequency characteristic	DC ~ 20 khz + 0 -0.1 db DC ~ 300 khz + 0 -3dB
Signal-to-noise ratio (IHF-A)	125dB
Residual noise	0.15 mV or less
Damping factor	120 (8 Ω)
Load impedance	Main or remote : 4 Ω ~ 16 Ω Main + remote : 8 Ω ~ 16 Ω
Input Sensitivity / Impedance	1V/47k Ω
Output meter reading range	-60dB to + 5 dB 0.0001W ~ 1 kW (8 Ω)
Meter indication accuracy	± 1 dB (less than -40dB, 10 Hz to 10 kHz) ± 1 dB (-40dB or more, 10 Hz to 20 kHz)
Attack time	50 μ sec
Recovery time	750 msec (0 dB → -20dB)
Pwer	100 VAC, 50Hz/60Hz
Power consumption	485W
External dimensions	Width 430x Height 208x Depth 507 mm
Weight	39kg