Marantz PM-54
¥ 62,000 (released in 1984)
Commentary
This pre-main amplifier was developed along with the PM-64 based on the concept of digital compatibility and realized AVSS mounting and low-impedance compatibility.
Equipped with AVSS (Auto Voltage Shift Supply) that shifts the output supply voltage according to the power. By driving the power element at the output supply voltage most suitable for each power from small output to maximum output, high power is realized while maintaining the quality.
Designed for low impedance, it maintains power even when the speaker impedance momentarily fluctuates to an extremely low value.
It is equipped with a direct switch for higher SN ratio and high-speed signal transmission of digital source.
In addition to the MM input, an MC input is also installed for playing analog discs.
Model Rating
| Type | Pre-main amplifier |
| Rated output | 80W + 80W (8 Ω, 20 Hz to 20 kHz) 95W + 95W (4 ω, 1 khz) |
| Output Bandwidth (8 Ω, 0.03% THD) | 5 Hz to 40 kHz |
| Total Harmonic Distortion Factor (20 Hz to 20 kHz, 8 Ω) | 0.015% |
| Cross modulation distortion factor | 0.015% |
| Frequency characteristic | 20 Hz ~ 20 kHz + 0 -0.3 dB |
| Damping factor (8 Ω) | 90 |
| Input Sensitivity / Impedance | Phono MM : 2.5mV/47k Ω Phono MC : 250 μ V/100 Ω Tape, Tuner, Aux, CD : 150mV/25k Ω |
| Output impedance | Tape out : 900 Ω |
| RIAA deviation | 20 Hz to 20 kHz ± 0.2 dB |
| Signal-to-noise ratio (IHF-A network) | Phono MM:84dB Phono MC:68dB Tape, Tuner, Aux, CD : 96 dB |
| Phono maximum allowable input | MM:140mV MC:14mV |
| Tone control characteristics | Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz) |
| Pwer | 100 V, 50/60Hz |
| Power consumption | 150W |
| External dimensions | Width 416x Height 136x Depth 334 mm |
| Weight | 8.8kg |
| Sold Separately | Sidewood WPM-64 (¥ 4,000) |