DENON PMA-500Z
¥ 87,500 (around 1976)
Commentary
Pre-main amplifier using Darlington power transistor made by Motorola.
All stages use direct connection OCL circuit.
Model Rating
| Type | Pre-main amplifier |
| Power Amplifier Unit | |
| Circuit system | Pure complimentary service all-stage direct connection 2 power supply OCL circuit |
| Rated Output (Both channel drive) | 40W + 40W (8 ohm, 1 khz) 37W + 37W (8 ω, 20 Hz to 20 kHz) |
| Total harmonic distortion factor | 0.1% or Less (at Rated) |
| Cross modulation distortion factor | 0.1% or Less (at Rated) |
| Power Band With | 5 Hz to 75 kHz |
| Frequency characteristic | 10 Hz to 100 kHz + 0 -1dB |
| Input sensitivity | 1Vrms |
| Output impedance | 0.16 Ω or less |
| Residual noise | 0.5 mV or less |
| Preamplifier Section | |
| Maximum power output | 7 Vpeak or more |
| Total harmonic distortion factor | 0.03% or Less (at Rated) |
| Input sensitivity | Phono1/2 : 2mVrms/60k Ω |
| RIAA deviation | 20 Hz to 20 kHz ± 0.5 dB |
| Signal-to-noise ratio (IHF-A network) | Phono1/2 : 74 dB or more |
| Tone Control Section Frequency Characteristics | Tone Defeat : 10 hz to 40 khz + 0 -1dB |
| Filter characteristic | High Filter : 9 kHz, 12dB/oct. Low Filter : 40 Hz, 12dB/oct. |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 70W |
| External dimensions | Width 430x Height 140x Depth 350 mm |
| Weight | 12.5kg |