Marantz SH-A20
¥ 208,000 (around 1983)
Commentary
This is a pre-main amplifier developed with the aim of sound that is as close as possible to human sensitivity as possible, rather than technology.
Unlike the conventional high-gain equalizer configuration, it is equipped with a full-scale MC head amplifier with carefully selected ultra-low-noise transistors.
The phono amplifier realizes a wide bandwidth and low noise with high-precision equalizer elements and push-pull circuits for all stages. In addition, you can enjoy playback utilizing the individuality of each MM cartridge depending on the ドーロセレクター.
The class AB DC-power amplifier section is connected from the input stage of the matched pair dual FET to the super high fTMarantz's unique Low-TIM design that minimizes dynamic strain up to the output stage of 3-stage Darlington connection by transistor.
A large-capacity toroidal transformer and a super audio capacitor are used for the power supply.
It features tape-to-tape dubbing and a microphone mixing circuit that can mix with any source, including phono and tuner CDs.
Model Rating
| Type | Stereo pre-main amplifier |
| Rated Output (20 Hz ~ 20 kHz) | 130W + 130W (8 Ω) |
| Total harmonic distortion factor | 0.02% or Less (20 Hz ~ 20 kHz, 8 Ω) |
| Frequency characteristic | 5 Hz to 100 kHz ± 1 dB |
| RIAA deviation | 20 Hz to 20 kHz ± 0.5 dB |
| Input sensitivity | Phono MM:2.0mV Phono MC:0.11mV High Level:150mV |
| Signal-to-noise ratio (IHF-A) | Phono MM:84dB Phono MC:78dB High Level:94dB |
| Rated power consumption | 350W (Electrical Appliance and Material Control Law) |
| External dimensions | Width 461x Height 193x Depth 345 mm |
| Weight | 16.5kg |