Hitachi HA-3500 (1979)

 Hitachi HA-3500 Stereo Integrated Amplifier (1979)

Features:

Low-distortion power amplifier

Power level meters for output power readout

Connection facilities for two pairs of speakers

New ICs in the Equalizer and pre-amplifier

Subsonic filter that cuts out rumble and wow in the ultra-low frequencies without impairing the sound quality

LED program source indicators

Specifications:

Power Output:

30 watts per channel, (min. RMS, at 8 Ω from 20-20,000 Hz, with no more than 0,05% THD)

33 + 33 W/channel (both channels driven into 8 Ω, 20-20,000 Hz, 0,05% THD)

36 + 36 W/channel (8 Ω, 1 kHz, 0,05% THD)

38 + 38 W/channel (4 Ω, 1 kHz, 0,15% THD)

Power Bandwidth:  10 Hz - 50 kHz

Frequency Characteristics:

Tuner, Tape 1, 2:  10 Hz - 40 kHz (+0,5 -1,5 dB)

Phono :  RIAA ±0,3 dB

Total Harmonic Distortion:

Less than 0,05% at rated output

Less than 0,03% at ½ rated output

Intermodulation Distortion:  less than 0,03% (at ½ rated output)

Input Sensitivity/Impedance:

Phono :  2,5 mv / 47 k Ω

Tuner :  150 mv / 33 k Ω

Tape 1, 2 :  150 mV / 33 k Ω

Output level:

Tape Out :  150 mV

Phono Overload Level (at 1 kHz, 0,05% THD):  200 mV

Signal-to-Noise Ratio (IHF a network):

Phono :  75 dB

Tuner, Tape 1,2 :  90 dB

Damping Factor:  30 (1 kHz , 8 Ω)

Bass Control:  ±10 dB at 100 Hz

Treble Control:  ±10 dB at 10 kHz

Loudness Control:  +9 dB at 100 Hz; +4 dB at 10 kHz

Subsonic Filter:  20 Hz (-12 dB/oct)

Semiconductors:  4 ICs, 24 transistors, 18 diodes (2 LEDs)

Power Supply:  AC 120 V 60 Hz; 220 V 50/60 Hz; 240 V 50/60 Hz; 120/220/240 V 50/60 Hz

Power Consumption:  160 W (at ⅓ rated output) 240 W (at rated output)

Dimensions (W x H x D):  435 x 110 x 275 mm

Weight:  6 kg