Launched in 1978-79, the Denon PMA 850 is considered one of the best of its time and one of the best ever made by Denon.
85 w per channel at 8Ω, stunning construction, impressive sound with amazing detail.
Elaborate, high-quality construction (18 kg of quality), excellent Phono section with 2 MM and 1 MC inputs – the separate preamplifier and power amplifier, capable of working well with difficult speakers.
Many inputs, including: Phono 1 2 (MM) and 3 (MC), tuner, auxiliary, cassette 1 and 2. Equalization, volume, high and low filter adjustments, direct source function and headphone jack on the front.
It reaches the highest class in the most fundamental characteristic of amplifiers, both in distortion factor and signal-to-noise separation.
It makes you wonder what hi-fi has been up to in the last forty years…
Type Pre-main amplifier
Power Amplifier Unit
Circuit system All-stage pure complimentary service push-pull circuit
Rated Output (Both channel drive) 85W + 85W (8 ohm, 20 hz ~ 20 khz, THD 0.01%)
110W + 110W (4 ω, 1 khz, THD 0.05%)
Total harmonic distortion factor 0.01% or less
Cross modulation distortion factor
(60Hz:7kHz=4:1) 0.02% or Less (at Rated Output Equivalent Amplitude Output)
0.01% or Less (Sine Wave 1W Equivalent Amplitude Output)
Output bandwidth 5 Hz ~ 100 kHz (IHF, THD 0.1%)
Transmission Characteristics (at 1W output) DC ~ 100 kHz + 0 -1dB
Input Sensitivity / Impedance 1V/50k Ω
Output impedance 0.16 Ω or less
Signal-to-noise ratio 122dB
Output terminal Speaker AORb : 4 Ω ~ 16 Ω
Speaker A + B : 8 Ω ~ 16 Ω
Headphone port
Preamplifier Section
Output Level / Impedance Pre out : 1 V (Rated), 20 V (Maximum Output at 50k Ω Load)
Rec out : 320 mv (Rated), 20 v (Maximum Output, Load 50k Ω, THD 0.01%)
Total harmonic distortion factor 0.03% (at 3 V output)
Input Sensitivity / Impedance Phono1, 2 mm : 2.5mV/50k Ω
Phono3 mc : 0.37 mV (at cartridge impedance 40 Ω)
Tuner, Aux, Tape : 320mv/40k Ω
Maximum Allowable Input (1 kHz) MM:200mV
MC : 30 mv (40 Ω)
RIAA deviation 20 Hz to 20 kHz ± 0.2 dB or less
Signal-to-noise ratio (IHF, A-network) Phono MM : 89 dB or more (at input short-circuit)
Phono MC : 74 dB or more (at input terminal 40 Ω)
Tuner, Aux, Tape : 100 dB or more (when the input is short-circuited)
Frequency Response (Aux → Pre out) 5 Hz ~ 100 kHz + 0 -1dB at Tone Defeat
Tone Control Variable Range Bass : ± 8 dB (100 Hz)
Treble : ± 8 dB (10 kHz)
Filter characteristic Subsonic filter : 20 Hz, 12dB/oct.
High cut filter : 9 kHz, 12dB/oct.
Loudness control Low frequency : + 7 dB (100 Hz)
High frequency : + 6 dB (10 kHz)
Muting -20dB
<General>
Power outlet Switched : 1 system, 100W
Unswitched-2, 250W (total)
Power 220 VAC, 50Hz/60Hz
Power consumption 215W (Electrical Appliance and Material Control Law)
External dimensions Width 434x Height 164x Depth 400 mm (including leg, knob, terminal)
Weight 17kg