Audio Database

The

DIATONE DA-55U
88,000yen(1968 release)

Description
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The No. 1 amplifier which the Diatone put on the market.

The output circuit where continuation output 100W+100W (4ohms) is possible is carried.

4-unit volume is adopted.


Rating of a mode
Form Stereo Integrated Amplifier
An output/distortion At the time of a continuation output: 100W+100W (4ohms) / 0.3% or less
Music power: 130W+130W (4ohms) / 0.5% or less
Output load impedance 4-16ohm
Input sensitivity/impedance Phono1, 2:3mV/30kohm
Tape, Tuner:100mV/250kohm
Aux: 100mV/250kohm (half-fixation)
Output voltage Rec out:100mV
Tape moni:100mV
Tone control Low-pass: }6dB (100Hz, 2dB step)
High region: }6dB (10kHz, 2dB step)
Filter Low-pass: 50Hz-12 dB/oct cut
High region: 9kHz-12 dB/oct cut
Frequency response Preamplifier part: 20Hz-50000Hz}1dB
Main-amplifier part: 15Hz-70000Hz}1dB
S/N 75dB or more (AUX terminal)
Dumping factor 30-40
Use transistor Silicon transistor x44
Diode x17
Thyristor x2
Power source 100V, 260VA
Weight 17kg