Audio Database

The

DIATONE DA-U1000
118,000yen(around the 1982 time)

Description
 
It is an Integrated Amplifier of DIATONE by OEM of SANSUI..

The NFB circuit from which TIM distortion tends to be started is improved fundamentally, and new circuitry with which the feed forward circuit and the NFB circuit were made to newly dock is performed. Making into theoretical-value top zero all distortion that this generates in a power stage makes it possible.

In respect of a material, magnetostriction is eliminated by using adoption of a copper-coating chassis, and a non magnetic element so much.
Moreover, the formal construction which avoided the magnetic flux is formed, such as adopting a heat pipe.

The large-sized power transformer which took L/R independence and a stage independent system, and high speed and a super-low magnification condenser are adopted as a power-source part.

The newly developed equalizer circuit is adopted.

MC head amplifier in which 2 position gain change is possible is carried.


Rating of a mode
Form direct-current Integrated Amplifier
<Power amplifier part>
Effective output (10Hz - 20kHz, THD 0.003%) 100W+100W (8ohms)
THD (10kHz - 20kHz, effective output) 0.003% or less (8ohms)
Cross modulation distortion (60Hz:7kHz=4:1, SMPTE) 0.003% or less (8ohms)
Output bandwidth (IHF, both ch(es) operation, THD 0.02%) 5Hz - 80kHz (8ohms)
Dumping factor (new IHF) 100 (8 ohms, 20Hz - 20kHz)
Frequency response (1W) direct-current-300kHz+0dB-3dB
<Equalizer amplifier part>
Input sensitivity/impedance (1kHz) Phono1, 2 MM:2.5mV /, 47kohm
Phono1, 2 MC: 100 microvolts, 300 microvolts/100 ohms
Tuner, Aux, Tape play1, 2:250mV/27kohm
Phono maximum permissible input (1kHz, THD0.01%) MM:200mV
MC:25mV
An Output voltage/impedance (1kHz) Tape rec (PIN): 250mV (47kohm)/600ohms
THD (20Hz - 20kHz, 5V output) Phono MM: 0.005% or less
Phono MC: 0.006% or less
RIAA deflection (MM, Rec out) 20Hz-300kHz±0.2dB
Signal to noise ratio (A network, a short circuit) Phono1, 2 MM: 90dB or more
Phono1, 2 MC: 74dB or more
Tuner, Aux, Tape play1, 2:110dB or more
Channel separation (1kHz) Phono1, 2 MM: 60dB or more
Phono1, 2 MC: 50dB or more
Tuner, Aux, Tape play1, 2:80dB or more
<Synthesis>
Power source AC100V, 50Hz/60Hz
Rated power consumption (Electrical Appliance and Material Control Law) 250W
Dimensions Width 460x height 160x depth of 404mm
Weight 14.7kg