Audio Database


Marantz PM-54 62,000yen(1984 release)

The Integrated Amplifier which was developed by the basis of the thought corresponding to digital one with PM-64, and realized AVSS loading and a low impedance correspondence.

AVSS (auto voltage shift supply) which shifts output supply voltage according to power is carried, and high power-ization is realized by driving a power element with the output supply voltage which was most suitable for each power from the Koide power to the maximum output, maintaining a quality.

The design corresponding to a low impedance is carried out, and power is maintained even if it changes a speaker impedance to a very low value momentarily.

In quest of a high SN ratio and high speed signal transmission, the direct switchpoint is carried from that of the digital source.

In addition to man-month input, MC input is also carried in playback of an analog disk.

Rating of a mode
Form Integrated Amplifier
Output power 80W+80W (8 ohms, 20Hz - 20kHz)
95W+95W (4 ohms, 1kHz)
Output bandwidth (8 ohms, THD 0.03%) 5Hz - 40kHz
THD (20Hz - 20kHz, 8ohms) 0.015%
Cross modulation distortion 0.015%
Frequency characteristic 20Hz-20kHz+0 -0.3 dB
Dumping factor (8ohms) 90
Input sensitivity/impedance Phono man month: 2.5mV/47kohm
Phono MC: 250 microvolts/100 ohms
Tape, Tuner, Aux, compact-disk:150mV/25kohm
Output load impedance Tape out: 900ohms
RIAA deflection 20Hz-20kHz±0.2dB
SN ratio (IHF-A network) Phono MM:84dB
Phono MC:68dB
Tape, Tuner, Aux, compact disk: 96dB
Phono maximum permissible input MM:140mV
Tone control property Bass: ±10dB (100Hz)
Treble: ±10dB (10kHz)
Power source 100V, 50/60Hz
Power consumption 150W
Dimensions Width 416x height 136x depth of 334mm
Weight 8.8kg
Option Sub- wood WPM-64 (4,000yen)