Audio Database

The

Marantz PM-70 69,800yen(around the 1981 time)

Description
 
The Integrated Amplifier which carries a graphic equalizer.

The five right-and-left independent graphic equalizer is carried in the front panel.
It is possible to be able to control ±10dB on the frequency of five points, respectively, to rectify the acoustic feature of a listening room, and to make a favorite tone quality.
Moreover, if the Tape EQ switchpoint carried in the graphic equalizer central part is turned ON, it can rectify also in the sound-recording source.

Two headset jacks are carried.
Furthermore, the Normal/High level change-over switch into which a headphone sound volume is changed twice is carried, and all kinds of headphone can be used.

The super-low-noise high gain equalizer which MC cartridge can connect direct is carried.

L (linear) servo which is an original new circuitry is built in.
This circuitry is a circuitry which included DC servo and the distortion servo,The input and output of a main amplifier are measured, and distortion by the loss speaker counter-electromotive force under the influence of a noise, a direct current component, and output transmission routes (coil relay etc.) etc. has taken out and canceled the component which is not includeded in an input signal.


Rating of a mode
Form Stereo Integrated Amplifier
Output power (20Hz - 20kHz) 80W+80W (8ohms)
THD (at the time of an Output power) 0.015%
Frequency characteristic 10Hz-70kHz±1dB
SN ratio Phono MM:90dB
Phono MC:78dB
DF value 250
Center frequency 50Hz, 200Hz, 800Hz, 3.2kHz, 12.8kHz
Dimensions Width 416x height 117x depth of 329mm
Weight 8.5kg