Audio Database


Lo-D HA-5700
69,800yen(1979 release)

The Integrated Amplifier which adopted Power MOS FET.

The simple three-step hardwired-connection DC power circuitry is fundamentally adopted as the circuitry of a power amplifier part similarly to HMA-9500.

The newly developed low noise integrated circuit is adopted as an equalizer amplifier and tone amplifier, and circuitry serves as a 3 steps of difference input hardwired-connection push pull output.
Moreover, an interconnection of MC cartridge is possible by adopting the integrated circuit of high gain.

The power-source part has realized the power-source part which is generous also to a large swing by adoption of two power transformers and smoothing capacitors (1000micro-F+1000micro F).

A low filter, the tone-defeat switchpoint, the monitor switchpoint, the loudness, and the loudspeaker circuit changing switch are carried.

Rating of a mode
Form Integrated Amplifier
Effective output 50W+50W (8 ohms, both channel drive, 20Hz - 20kHz, Tuner in)
THD 0.02% (at 20Hz - 20kHz, the time of an Output power 8ohms)
Output bandwidth 5Hz - 40kHz (at the time of 0.05% and 25W output 8 ohms, Tuner in)
Cross modulation distortion (60Hz:7kHz=4:1) 0.03% (at the time of 25W output Tuner in)
Frequency characteristic Phono: 20Hz-20kHz±0.3dB
Tuner, Aux, Tape1, and 2:10Hz-100kHz+0.5 -4.5 dB
Input sensitivity/impedance Phono man month: 2.5mV/47kohm
Phono MC: 0.25mV/100 ohms
Tuner, Aux, Tape1, 2:150mV/47kohm
An Output voltage/impedance Rec out: 150mV/470 ohms
Phono maximum permissible input (1kHz, 0.01%) MM:250mV
SN ratio (IHF-A network) Phono MM:80dB
Phono MC:60dB
Tuner, Aux, Tape1, 2:100dB
Tone control Bass: ±8dB (100Hz)
Treble: ±8dB (10kHz)
A low filter 15Hz, 6dB / oct
Loudness (-30dB) +3dB(10kHz)
Supply voltage AC100V, 50Hz/60Hz
Power consumption
(Electrical Appliance and Material Control Law)
AC outlet Power-switch interlock: One line
Power-switch un-interlocking.: Two lines
Dimensions Width 435x height 110x depth of 383mm
Weight 10.8kg