DENON PMA-940V
¥ 69,800 (around 1985)
Commentary
As a component of the CD era, this pre-main amplifier has refined functions and performance.
For the power stage, the dual super non-feedback circuit has been further improved to improve the slew rate characteristics.
F for the output stageTIt is a 3-stage Darlington push-pull configuration using high-speed and large-capacity power transistor of 50 mhz or more and Pc150W.
In addition, a DC servo circuit provides a complete DC configuration that does not use a single coupling capacitor for all signal paths between the MC input terminal and the speaker output terminal, a non-feedback system with no signal return, and a f with excellent high-frequency characteristics.TCombined with a new current mirror circuit using a 250 mhz high-speed transistor, a high-through rate is realized.
The power supply uses a 220 VA transformer and an audio block capacitor of 32,800 μ F (8,200 μ Fx4).
In addition, the generation of low-frequency distortion is reduced by setting the floating load circuit with clear ground potential.
In addition, the newly developed pure dynamic power supply circuit has significantly improved sound quality degradation caused by ripple current.
The super equalizer, which consists of the first stage of low-noise FET differential amplification, achieves a wide range of RIAA deviation of 20 Hz to 100 kHz ± 0.3 dB at MC.
To accommodate surround processors, graphic equalizers, channel dividers, etc., it is equipped with a "processor loop".
The phono input terminal uses a gold-plated terminal.
Equipped with broadband real-time tone control and subsonic filter.
Model Rating
| Type | Pre-main amplifier |
| Power Amplifier Unit | |
| Rated Output (20 Hz ~ 20 kHz) | 105W + 105W (8 Ω) 125W + 125W (6 Ω) |
| Input Sensitivity / Impedance | Processor Loop Input : 150mV/20k Ω |
| Total harmonic distortion factor | 0.004% (20 Hz to 20 kHz, 52.5W, 8 Ω) |
| Cross modulation distortion factor | 0.003% (equivalent to 105W, 8 Ω) |
| Dynamic Power | 250W/2 Ω |
| TIM Distortion | Measurement limit value or less |
| Slew rate | ± 350 V / μ sec or more |
| Output bandwidth | 5 Hz to 80 kHz (52.5W, 0.03%, 8 Ω) |
| Frequency characteristic | 4 Hz ~ 250 kHz, + 0 -3dB (1W, 8 Ω) |
| Output impedance | 0.1 Ω or less |
| Output terminal | Speaker : AORb : 6 ~ 16 Ω, A + B : 12 ~ 16 Ω Headphone Jack Maximum Output : 410 mW (8 Ω), 8 ~ 400 Ω Compatible |
| Preamplifier Section | |
| Input Sensitivity / Impedance | Phono MM : 2.5mV/47k Ω Phono MC : 0.2mV/100 Ω CD, Tuner, Video1, 2/AUX, Tape1, 2 : 150mV/30k Ω |
| Maximum Output / Rated Output | 12V/150mV |
| Total harmonic distortion factor | 0.001% (1 khz, 8 v) |
| RIAA deviation | 20 Hz ~ 100 kHz ± 0.3 dB (MC / MM IN ~ Rec Out / Processor Loop) |
| <General> | |
| Signal-to-noise ratio (Input Short Circuit, Auditory Sense Correction A) |
Phono MM : 87 dB at 2.5 mV input Phono MC : 70 dB (at 0.25 mV input) Line : 107 dB (at 150 mV input) |
| Tone control characteristics | Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz) |
| Subsonic filter | 18 Hz, -6dB/oct. |
| Loudness control characteristic | 100Hz:+7dB 10kHz:+6dB |
| Muting | -20dB |
| Power consumption | 205W (Electrical Appliance and Material Control Law) |
| Pwer | 100 VAC, 50Hz/60Hz |
| External dimensions | Width 434x Height 139x Depth 414 mm (including foot, knob, terminal, etc.) |
| Weight | 10.6kg |