MITSUBISHI DIATONE DA-A10 Power Amplifier

Description

Feature series power amplifier.
Adopts 2 monaural construction with power supply for each left and right channel and 2 monaural amplifiers on the same chassis.
Therefore, the mutual interference from a power source is suppressed and the separation between channels is improved sharply.
The symmetrical complementary 3-stage Darlington OCL circuit and the differential amplification 2-stage current mirror drive system are adopted.
Low distortion is possible by using a three-stage Darlington circuit with a large DC current amplification factor and a current mirror circuit that can drive the target with high gain and have little distortion.
By combining a current mirror drive and a transistor with excellent high-frequency characteristics, the rise characteristics of the pulse and the distortion characteristics in the high frequency range are improved.
The power supply circuit uses two 200VA power transformers and two 63V, 10000μFx2 power supply capacitors.
A huge heat sink of 0.35 ° C / W per channel is attached to the outside.
As a result, the cooling effect is extremely high, and the junction temperature of the power transistor can be kept low enough for use.
High reliability is ensured in combination with the parallel push-pull of the power transistor of Pc = 100W.
The relay for protection is used as it is for switching the speaker.
As a result, there is no conventional speaker changeover switch, so the damping factor does not decrease due to the contact resistance of the speaker changeover switch.
It can be docked with the Feature series preamplifier and can be remotely controlled by the preamplifier.
Model: Stereo power amplifier
Output:
20Hz-20kHz: 100W + 100W (8Ω)
135W + 135W (4Ω)
1kHz: 115W + 115W (8Ω)
155W + 155W (4Ω)
Music power: 320W (8Ω)
600W (4Ω)
EIAJ (5% distortion): 250W (8Ω)
400W (4Ω)
Harmonic distortion factor:
Rated output: 0.1%
At 1W (20Hz-20kHz): 0.02%
Rated output (-3dB, 1kHz): 0.003%
Intermodulation distortion (1W, 50Hz: 7kHz = 4: 1) 0.03%
Input sensitivity / impedance 1V (variable) / 50kΩ
Frequency characteristics (0.5W, 0dB -1dB) 10Hz-100kHz
Output bandwidth (IHF 0.1% distortion) 10Hz-50kHz
Damping factor: 100
Channel separation:
1kHz: 90dB
20kHz: 80dB
Residual noise: 0.30 mV
Muting time: 5 seconds
Applicable load impedance: 4 to 16Ω
Power supply: AC100V 50Hz / 60Hz
power consumption:
Electrical Appliance and Material Control Law: 240W
Rated output (8Ω): 380W
External dimensions: Width 425 x Height 170 x Depth 285 mm
Weight: 16.5kg
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