Marantz PM-80

October   1 9 8 9 october 1989
1 9 9 2 1992

First of a long and very successful line of amplifiers which were all higher-end versifications of it.

Powering everybody is a large EI transformer and 2x 18,000µF / 63V ELNA For Audio caps. Regulated feeds separately power the EQ, indication LEDs, voltage amp and output stage. A CCNE noise-killer circuit is inserted in the dedicated output stage power-supply.

The output stage uses Sanken Darlington packs with two pairs of copper-clad p-p of 2SA1265 / 2SC3182 each with a 100W Pc. The Class A mode is switched with an opto-coupler and transistor which rise bias.

The phono stage is a differential FET input with ahigh-quality op'amp for the MC gain ; the same op'amp is used for the tone controls ; relays are used to switch inputs and the AC cord is OFC-wired.

Very low distortion swift rise time, excellent RIAA accuracy but a none-too-flat response in Class A/B which slightly (slighty !) favors the midband.
The later upgraded models (PM-80a first) corrected that and added more bass oomph, better highs and tighter stereo scenery through componentry upgrades and HDAM modules and more attention paid to the volume attenuator.


A real PM-80 here and in black here.

Marantz PM-80, image 1 Marantz PM-80, image 2 Marantz PM-80, image 3 Marantz PM-80, image 4
Marantz PM-80 specifications
Title Value
Class A power output : 2x 20W (8 Ohm)
Class A/B power output : 2x 140W (4 Ohm, 20Hz...20Khz)
2x 120W (6 Ohm, 20Hz...20Khz)
2x 100W (8 Ohm, 20Hz...20Khz)
Dynamic A/B power output : 2x 340W (2 Ohm)
2x 220W (4 Ohm)
2x 170W (6 Ohm)
THD : 0,008% (1Khz, 8 Ohm)
Power bandwidth : 10Hz...50Khz (8 Ohm, 0,003% THD)
Frequency response : 10Hz...100Khz (+0 / -1dB)
Damping factor : 180 (8 Ohm, 20Hz...10Khz)
S/N ratio : 111dB (lines)
RIAA accuracy : ± 0,1dB
Inputs : 250µV / 100 Ohm (MC)
2,5mV / 47kOhm (MM)
150mV / 33kOhm (lines)
Maximum phono input : 16mV (MC, 1Khz)
160mV (MM, 1Khz)
Outputs : 3x tape
1x processor loop
PC : 220W max.
Dimensions : 45,4 x 16,5 x 38cm
Weight : 17,5kg.
List price : 65,000¥
EU measured specs EU measured specs
MM maximum input : 22mV at 50Hz
150mV at 1Khz
1100mV at 15Khz
MM S/N ratio : 87dB unweighted
91dBA weighted
MM channel balance : within 0,1dB
MC maximum input : 2,3mV at 50Hz
15mV at 1Khz
110mV at 15Khz
MC S/N ratio : 69dB unweighted
73dBA weighted
Class A output : 2x 25W (8 Ohm, 1Khz, 0,31% THD)
Class A THD : 0,0067% / 0,0065% (10W at 40Hz, L/R)
0,0049% / 0,0042% (10W at 1Khz, L/R)
0,0094% / 0,0071% (10W at 20Khz, L/R)
0,0082% / 0,0083% (5W at 40Hz, L/R)
0,0057% / 0,0058% (5W at 1Khz, L/R)
0,0071% / 0,0063% (5W at 20Khz, L/R)
0,016% / 0,016% (1W at 40Hz, L/R)
0,012% / 0,011% (1W at 1Khz, L/R)
0,011% / 0,011% (1W at 20Khz, L/R)
Class A/B output : 2x 108W (8 Ohm, 1Khz)
Class A/B THD : 0,0055% / 0,0057% (40W at 40Hz, L/R)
0,0038% / 0,0041% (40W at 1Khz, L/R)
0,015% / 0,0061% (40W at 20Khz, L/R)
0,0058% / 0,0061% (20W at 40Hz, L/R)
0,0042% / 0,0047% (20W at 1Khz, L/R)
0,015% / 0,0076% (20W at 20Khz, L/R)
0,023% / 0,024% (1W at 40Hz, L/R)
0,012% / 0,016% (1W at 1Khz, L/R)
0,015% / 0,016% (1W at 20Khz, L/R)
S/N ratio : 108dB (rated power, unweighted)
Rise time : 2,2µs (10Khz)
Marantz PM-80 : 0 topic
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page online since : april 2012
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