Denon PMA-500

October   1 9 7 2 october 1972
1 9 7 5 1975

Upper-mid integrated amp with one feature that set it apart in 1973 :
a phono MC stage... which however works with dedicated back transformer terminal (à la Luxman AD8000) so there is no MC stage inside per se but it's written on the faceplate :)

Said transformer was named DL-103T (for the DL-103 - no wonder) and cost very little (3400¥ in 1970) so it was probably made for earlier amps.

The rest is a slightly slimmed-down PMA-700 / PMA-700Z : one fairly big trafo, Motorola output transistors, DC output stage, two heatsinks/Darlington packs, two back MIC input pots with front mic mixing knob, null balance switch and a pre/main loop.

Updated as PMA-500Z in 1975 mainly without the MIC functions - but a sizeable price increase.
Then as PMA-500V in 1985 - but that's a really different item.



A real PMA-500 here and the updated version here.

Denon PMA-500, image 1
Denon PMA-500 specifications
Title Value
MAIN section MAIN section
Musical power : 2x 42W (8 Ohm, 0,1% THD, one channel only)
Nominal power : 2x 40W (8 Ohm, 0,5% THD)
2x 37W (8 Ohm, 0,1% THD)
THD : < 0,03% (-3dB down rated power)
IMD : < 0,06% (-3dB down rated power)
Power bandwidth : 5Hz...35Khz (+0 / -1dB, 0,1% THD)
5Hz...75Khz (+0 / -3dB, 0,5% THD)
Frequency response : 10Hz...10Khz (+0 / -1dB, 0,1% THD, 10W output)
Input : 1V / 100kOhm (80kOhm for 5Hz...20Khz)
Residual noise : < 0,01µW (input shorted)
S/N ratio : > 95dB
Damping factor : > 50 (5Hz...10Khz)
Output impedance : < 0,16 Ohm (pure load, 1Khz)
PRE section PRE section
Nominal output : 1V
Maximum output : 5V
THD : < 0,1% (100Hz...10Khz)
< 0,05% (100Hz...10Khz)
IMD : < 0,1% (rated power)
Frequency response : 10Hz...40Khz (+0 / -1dB, tone controls OFF)
Inputs : 2mV / 60kOhm (±20%, phono 1 & 2)
1mV / 100kOhm (±20%, MIC 1 & 2)
100mV / 60kOhm (±20%, tuner & aux)
500mV / 60kOhm (±20%, tape play)
Outputs : 100mV / <1kOhm (±20%, tape RCA)
40mV / 80kOhm (±20%, tape DIN)
Maximum input level : 200mV (phono 1 & 2, 1Khz, 0,1% THD)
80mV (MIC, 0,1% THD)
RIAA curve : ± 0,5dB (30Hz...15Khz)
S/N ratio : > 65dB (phono 1 & 2)
> 55dB (MIC 1 & 2)
> 75dB (lines)
Muting switch : 0 / -10dB / -20dB
Bass control : ±10dB at 80Hz (-10,5dB)
Treble control : ±10dB at 12Khz (-9dB)
Low filter : 12dB/octave below 40Hz
High filter : 12dB/octave above 9Khz
General General
Semiconductors : 39x transistors
2x FETs
10x diodes
2x varistors
PC : 56W (multivoltage for EU & JP models)
Dimensions : 43 x 14 x 35cm
Weight : 12,5kg.
List price : 75,000¥ (1972)
Denon PMA-500 : 0 topic
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page online since : april 2012
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