Audio Database


Marantz PM-75 77,700yen(around the 1989 time)

The Integrated Amplifier which carries a digital analog converter.

A version LSI (TDA1541A) which Philips is proud of is adopted as a digital analog converter, and the digital signal is made to link to a highly precise analog circuit.

Thorough serious consideration of the S/N was carried out at the volume part, and the 4-unit master volume is adopted.
Moreover, the final stage of an amplifier part has adopted the three-step Darlington parallel push pull.

A large-sized transformer and capacitor are carried in the power-source part.
In order to prevent the wraparound of a digital noise, the D/A independent-source circuitry is adopted, and the analog system serves as a high stable high speed power source which made full use of high-integrated IC of a low-noise wide band.

The side panel of die-casting is adopted as a sub-.
Furthermore, die-casting framing which eliminated the ill effect of the oscillation is adopted, and the fine oscillation of the circuit board is also effectively controlled by the newly developed vibration suppression substrate material.

Digital one corresponds to three optical 1 coaxials, and the input unit supports all sampling-frequency 32/44.1/48kHz signals.
Moreover, the analog input serves as a design corresponding to the multi-source having those with seven line, and a Phono equalizer (MC, man month). The tapes circuitries are two analogs which can do mutual dubbing freely.

A tone control circuit is the shelving type which set center frequency as 60Hz and 15kHz, is suppressing an elevation of an unnecessary band, and it is considered so that a distorted incrementation and inflow of a noise may be prevented.

The Source-Direct functionality is carried, each stage to flat amplifier is jumped, and not only the output of a digital analog converter but analog output can be directly linked with a master volume.

The Jitter absorbing circuit is carried so that the fluctuation of the optical digital signal by oscillation of an optical cable etc. (Jitter) may be rectified.

The remote control which summarized the functionality compactly is equipped standardly.

Rear Attached
A Power Capacitor

Rating of a mode
Form Digital integrated amplifier
<Amplifier part>
Output power (20Hz - 20kHz, both ch(es) drive) 100W+100W (8ohms)
120W+120W (6ohms)
Dynamic power 220W+220W (2ohms)
180W+180W (4ohms)
150W+150W (6ohms)
THD (20Hz - 20kHz, 8-ohm load intensity) 0.008%
Cross modulation distortion (SMPTE) 0.008%
Output bandwidth (an 8-ohm load intensity, THD 0.03%) 10Hz - 50kHz
Frequency characteristic 10Hz - 150kHz, and +0 -3 dB
Input sensitivity/impedance Phono MC: 250 microvolts/150 ohms
Phono man month: 2.5mV/47kohm
High SFT Level: 150mV/20kohm
Phono maximum permissible input (1kHz) MC:20mV
RIAA deflection (20Hz - 20kHz) ±0.3dB
S/N ratio (A network) Phono MC:72dB
Phono MM:83dB
High Level:105dB
Tone control Bass: 100Hz, ±8dB
Treble: 10kHz, ±8dB
<Digital-analog-converter part>
Digital sampling frequency 32kHz, 44.1kHz, 48kHz
S/N ratio (EIAJ) 106dB
Distortion (EIAJ) 0.0035%
Dynamic range 96dB
Digital input Coaxial: 0.5 Vp-p/75ohms
Light: -15--25dBm
Digital output Coaxial: 0.5 Vp-p/75ohms
Power source 100V, 50/60Hz
Power consumption 200W
Dimensions Width 454x height 151x depth of 379mm
Weight 16.8kg