DENON PMA-390
¥ 33,000 (released in 1991)
Commentary
A pre-main amplifier that uses a large toroidal transformer and pursues a full-scale model beyond the class.
The power supply section uses a large toroidal transformer with less flux leakage.
In addition, the low impedance volume reduces the impedance of the volume control circuit, preventing the S/N ratio and frequency characteristics from deteriorating at general listening levels.
Equipped with a tone control circuit, it is possible to increase the bass and treble range, and it is also possible to make powerful playback even at low volume by the loudness.
In addition, it is equipped with a source direct switch, and by turning this switch on, it enables higher-purity playback without the tone control circuit.
Equipped with a wide-range equalizer amplifier that can be switched between MC and MM.
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Model Rating
| Type | Pre-main amplifier | ||
| Power Amplifier Unit | |||
| Rated Output (20 Hz ~ 20 kHz) | 73W + 73W (6 Ω) 60W + 60W (8 Ω) |
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| Dynamic Power | 140W + 140W (2 Ω) 120W + 120W (4 Ω) |
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| Input Sensitivity / Impedance |
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| Total harmonic distortion factor | 0.008% (1 kHz, 30W, 8 Ω) | ||
| Cross modulation distortion factor | 0.007% (equivalent to 60W output, 8 Ω) | ||
| Output bandwidth | 5 Hz ~ 40 kHz (Output 30W, 8 Ω, 0.07%) | ||
| Line input frequency characteristic | 4 Hz ~ 100 kHz + 0 -3dB (output 1W, 8 Ω) | ||
| Output impedance | 0.1 Ω or less | ||
| Speaker output terminal | AORb : 6 Ω ~ 16 Ω A + B : 12 Ω ~ 16 Ω |
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| Maximum headphone output | 28 mw (8 Ω) Compatible with 8 Ω ~ 400 Ω |
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| Preamplifier Section | |||
| Input Sensitivity / Impedance | Phono MM : 2.5mV/47k Ω Phono MC : 0.2mV/100 Ω |
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| Maximum Output / Rated Output | 10V/150mV(Rec out) | ||
| RIAA deviation | 20 Hz to 20 kHz ± 0.3 dB | ||
| <General> | |||
| SN ratio (Audibility compensation A, input short circuit) | Phono MM : 94 dB (at 5 mV input) Phono MC : 75 dB (at 0.5 mV input) CD, Tape, Tuner, Aux : 107 dB (source direct on) |
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| Tone control characteristics | Bass : ± 8 dB (100 Hz) Treble : ± 8 dB (10 kHz) |
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| Loudness control | 100Hz:+7dB 10kHz:+6dB |
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| Power supply voltage | 100 VAC, 50Hz/60Hz | ||
| Power consumption | 118W | ||
| External Dimensions (including legs, knobs, terminals) | Width 434x Height 120x Depth 279 mm | ||
| Weight | 5.8kg | ||