Marantz PM-75

Commentary

Pre-main amplifier equipped with D/A converter.

Philips' A-version LSI (TDA1541A) is used in the D/A converter to link digital signals to high-precision analog circuits.

For the volume part, S/N is emphasized thoroughly and a 4-strand master volume is adopted.
In addition, 3-stage Darlington parallel push-pull is adopted for the last stage of the amplifier section.

The power supply section is equipped with a large transformer and capacitor.
A D/A independent power supply circuit is adopted to prevent digital noise from entering, and the analog system is a highly stable high-speed power supply utilizing high-integration IC with low-noise broadband.

Die-cast side panels are used on the side.
In addition, diecast framing is adopted to eliminate the adverse effect of vibration, and the minute vibration of the circuit board is effectively controlled by the newly developed damping board material.

The input section is digitally compatible with one optical coaxial Route 3 and all signals with sampling frequencies of 32/44.1/48kHz.
There are seven analog inputs and a built-in phono equalizer (MC, MM) for multi-source design. There are two analog tape circuits that can be freely dubbed.

The tone control circuit is a shelving type with center frequencies set at 60 Hz and 15 kHz. Is designed to prevent the increase of distortion and inflow of noise by suppressing the rise of unnecessary band.

Equipped with the source direct function, it can jump through each stage up to the flat amplifier. Not only the output of the D/A converter but also the analog output can be directly connected to the master volume.

A jitter absorption circuit is installed to compensate for jitter in the optical digital signal caused by vibration of the optical cable.

Equipped with a compact remote control with functions as standard.

Model Rating

Type	Digital integrated amplifier
Amplifier Unit
Rated Output (20 Hz to 20 kHz, Both Channel Drive)	100W + 100W (8 Ω) 120W + 120W (6 Ω)
Dynamic Power	220W + 220W (2 Ω) 180W + 180W (4 Ω) 150W + 150W (6 Ω)
Total harmonic distortion rate (20 Hz to 20 kHz, 8 Ω load)	0.008%
Intermodulation Distortion Factor (SMPTE)	0.008%
Output Bandwidth (8 ohm load, 0.03% THD)	10 Hz to 50 kHz
Frequency characteristic	10 Hz to 150 kHz, + 0 -3dB
Input Sensitivity / Impedance	Phono MC : 250 μ V/150 Ω Phono MM : 2.5mV/47k Ω High Level : 150mV/20k Ω
Phono maximum allowable input (1 kHz)	MC:20mV MM:200mV
RIAA deviation (20 Hz to 20 kHz)	± 0.3 dB
S/N ratio (A-network)	Phono MC:72dB Phono MM:83dB High Level:105dB
Tone control	Bass : 100 Hz, ± 8 dB Treble : 10 kHz, ± 8 dB
D/A Converter Unit
Digital sampling frequency	32 khz, 44.1 khz, 48 khz
Signal-to-noise ratio (EIAJ)	106dB
Distortion Factor (EIAJ)	0.0035%
Dynamic range	96dB
Digital input	Coaxial : 0.5Vp-p/75 Ω Light : -15 to -25dBm
Digital output	Coaxial : 0.5Vp-p/75 Ω
<General>
Pwer	100 V, 50/60Hz
Power consumption	200W
External dimensions	Width 454x Height 151x Depth 379 mm
Weight	16.8kg