Marantz PM-90 160,000yen(1991 release)

Amplifier which tackled "the limits of a stereo image" which can also be said to be the brand identity of a Marantz, and "a modification of S/N on Hearing impression" from the front view, and brushed up the basic performance thoroughly.
It was developed in pursuit of the sound quality in a real busy condition rather than the catalog spec.

The 4-unit active volume scheme which prevents a failure of S/N at the time of a real using is adopted.
When a volume is extracted, the remains noise of the pre part was stopped according to an input signal becoming small, and high S/N is gained.

A power amplifier part builds the voltage amplification part of a high-speed and a low-impedance specification which made full use of a cascode technology, and constitutes the bipolar transistor from a parallel push pull in the power stage.
Furthermore, MOS FET was used for the driver stage and the electric cross interferencee is prevented.

The power-source parts are two power transformers with + and the powerful stream composition of total 500VA which made each of - take charge of.
Moreover, the orientation of an electric current of two transformers is set up conversely, and it is considered so that mutual leakage flux (leakage flux) may be negated.

The influence of an oscillation is suppressed by having adopted zinc die-casting as a chassis, and also fixing firmly by the top panel and die-casting side panel of 3mm thickness.

AC polarity indicator which can check the polar correction of a power cord at a glance is carried. 

Form	Stereo Integrated Amplifier
Output power	At the time of a Class-A operation : 25W+25W (8ohms) At the time of AB class operation : 180W+180W (4ohms) 150W+150W (6ohms) 130W+130W (8ohms)
THD	0.0015%
Frequency characteristic	10Hz-100kHz+0 -3 dB
SN ratio	High Level:111dB
Input terminal	compact-disk balance input: One line Line input: Four lines Phono input: One line Tape input: One line Processor input: One line
Output-terminal	Tape output: One line Processor output: One line Speaker output: Two lines
Power consumption	290W (Electrical Appliance and Material Control Law)
Dimensions	Width 454x height 170x depth of 460mm
Weight	27.0kg

Posted in: Marantz, Marantz-Amplifier, Marantz-Amplifier-Integrated, Marantz-Amplifier-Integrated-Amplifier