OTTO/SANYO DCA-1001
¥ 39,800 (around 1977)
Commentary
A pre-main amplifier with an IC dedicated to audio.
A 70W + 70W power IC is used for the power amplifier section. By using 50W + 50W power IC, the characteristics and sound quality have been improved.
The circuit configuration consists of 2-power supply system, first stage differential amplifier circuit, and 4-stage direct connection OCL circuit.
A 4-stage direct-coupled pure complimentary service circuit is used for the equalizer amplifier.
We also take into consideration the equalizer element to reduce the distortion factor.
Model Rating
| Type | Pre-main amplifier |
| Main Amplifier Section | |
| Circuit system | Differential input ± 2 power supply all stages directly connected OCL |
| Effective output (both channel drive) | 50W + 50W (8 Ω, 20 Hz to 20 kHz) |
| Total harmonic distortion factor | 0.3% (at rated output) 0.1%(-3dB) |
| Frequency characteristic | 15 Hz ~ 25 kHz + 0 -1dB |
| Output Bandwidth (IHF) | 10 Hz ~ 35 kHz (THD 0.3%) |
| Damping factor | 40 (1 kHz, 8 Ω) |
| Output terminal | Speaker A/B : 4 Ω ~ 8 Ω Speaker A + B : 8 Ω ~ 16 Ω |
| Preamplifier Section | |
| Input Sensitivity / Impedance | Phono : 2.5mV/50k Ω Tuner, Aux, Tape1/2 : 140mV/60k Ω |
| Phono maximum allowable input | 150 mv (1 kHz, RMS) |
| Output Level / Impedance | Tape rec 1/2:140mV |
| Frequency characteristic | RIAA deviation ± 0.5 dB |
| Signal-to-noise ratio (IHF-A) | Phono:65dB Aux:90dB |
| Tone control | Bass : ± 12 dB (50 Hz) Treble : ± 10 dB (20 kHz) |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Rated power consumption | 88W |
| External dimensions | Width 400x Height 148x Depth 350 mm |
| Weight | 9.8kg |