Audio Database

The

DIATONE DA-U600
46,800yen(around the 1972 time)

Description
 
It is the solid-state Integrated Amplifier which adopted the whole page direct connection circuit.

The whole page direct connection OCL circuit which used the differential amplifier for the power amplifier part, and removed the coupling capacitor is adopted. this compares the conventional condenser with the output circuit which carried out specification -- a fall and power band of a distortion -- while being able to perform expansion of the Wiz, in order that there may be no influence by an output capacitor, degradation of sound quality is prevented.

The high equalizer amplifier of an allowable input is adopted and the play which suppressed distortion is enabled.

Three-fold protection circuit is prepared and, in an abrupt increase, amplifier and a speaker are protected by four transistor protection fuses, two speaker protection fuses, four transistors, and the protection circuit of four diodes.

Playback of two tapes and dubbing are possible for not changing connection.

The microphone mixing circuit is built in.


Rating of a mode
Form Solid-state Integrated Amplifier
<Power amplifier part>
Effective maximum except take-off (distorted 0.5%) 30W+30W (8ohms)
THD 0.07% or less (20Hz - 20kHz)
Frequency response 10Hz - -50kHz 0.2dB
Dumping factor 40
Input sensitivity 1V
Input impedance More than 50kohm
<Preamplifier part>
Frequency response Phono: 20Hz - 20kHz (RIAA)
AUX, Tuner, Tape: -3 10Hz dB, -20kHz 0.2dB
Mic:100Hz -3dB 10kHz -6dB
Equalizer allowable input 170mV (1kHz, non clip)
Cross talk 55dB or more (1kHz)
Signal to noise ratio Phono: 65dB or more
AUX, Tuner, Tape: 85dB or more
Input sensitivity Phono:2.5mV
Mic:2mV
AUX, Tuner, Tape: 150mV
Output voltage Rec Out:150mV
Pre Out:1V
Tone control Bass: 100Hz, ±10dB
Treble: 10kHz, ±10dB
Loudness control (Volume-30dB o'clock) 100Hz : +6dB, 10kHz : +5dB
Low cut filter 70Hz-6dB
High cut filter 9kHz-6dB
<Synthesis>
Power supply voltage AC100V, 50Hz/60Hz
Power consumption 60W
Dimensions Width 456x height 144x depth of 355mm
Weight 9.1kg