Audio Database

The

DIATONE DA-U630
53,000yen(around the 1979 time)

Description
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It is the Integrated Amplifier which aimed at substantial play functions, such as a triple mixing circuit.

The power amplifier part considered it as first rank differential amplification and a whole page direct connection pure complimentary OCL circuit, and has acquired the outstanding distortion characteristic.

The equalizer amplifier part and the tone control flat amplifier part considered it as first rank differential amplification, and have adopted four-step direct connection type low noise IC.

Mixing amplifier is built in and triple microphone mixing using two wired microphones and one wireless microphone is possible. Furthermore, if a reverb circuit is used, an echo can also be applied to a microphone.

The LED power level indicator of a digital display is adopted as the display of a power level.
The Direct reading of the Output voltage can be carried out by nine points of •Ð channels.

The protection circuit which combined electronic and a relay is built in. If the direct-current electric potential more than a fixed level arises in the output terminal of power amplifier, the output and speaker of amplifier will be separated in an instant, and a speaker will be protected from breakage.
Moreover, this protection circuit operates also as a muting circuit which prevents the clicking noise generated at the time of power-source ON-OFF.

The tape duplicate switch is carried and the copy between tapes can be performed easily.

The low cut filter is carried


Rating of a mode
Form Integrated Amplifier
Output 50W+50W (at the time of 1kHz and an Output power)
THD 0.05% (at the time of 8 ohms and an Output power)
Output bandwidth (IHF 0.05% distortion, 8ohms) 10Hz - 30kHz
S/N (A network, input end short-circuit) Phono:74dB
Tuner, Aux, Play: 100dB
Dumping factor 25
Input sensitivity/impedance Phono: 2.5mV/50kohm
Tuner, Aux, Play1, 2:150mV/45kohm
Mic, Guitar/Mic:1mV/10kohm
An Output voltage/impedance Rec1, 2:150mV/600 ohms
Headphone: 400mV/eight ohms
Frequency response Phono: 20Hz-20kHz}0.5dB
Tuner, Aux, and Play:10Hz-30kHz+0 -1 dB
Tone control Bass: }10dB (100Hz)
Treble: }10dB (10kHz)
Dimensions Width 424x height 140x depth of 254mm
Weight 6.1kg