Audio Database

The

DENON PMA-880D
82,000yen(around the 1989 time)

Description
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The Integrated Amplifier which carries a D/A converter.

The real 18-bit super linear converter of the right-and-left channel independence equipped with the 4 time oversampling 18bit digital filter is carried in the D/A converter.

The optical classA circuit is adopted as a power amplifier part, and a musical average level is made to amplify as a pure Class-A, and is amplifying using the non switching Class-A system which has an effect also in the improvement of crossover distortion or switching distortion at the time of the Oide power.
The bias control circuit of high-speed operation is performing control of the magnification system by the size of an input level. An optical element is used for transfer of the control signal from this bias control circuit to a power transistor bias circuit, and the mutual interference between main signal system" and a bias controlling circuit is eliminated completely. And high speed-ization of bias control is realized.

The high speed and the mass transistor of fT20MHz and Pc150W are used for the final stage of power amplifier by the single push pull.
Moreover, in the power-source part, union of an electric power magnification circuit / power supply circuit is strengthened, instant response capability is heightened, and a 6.2kg shield power transformer is adopted as a power transformer.

The main signal and the power-source part are completely separated on both sides of a large-sized heat sink, and the right-and-left channel magnification circuit made part arrangement symmetry structure, and has abolished the characteristic difference.

MC/MM equalizer amplifier is carried.

Rear

Rating of a mode
Form Digital multi-interface loading Integrated Amplifier
<Power amplifier part>
Output power (20Hz - 20kHz) 130W+130W (6ohms)
110W+110W (8ohms)
Input sensitivity/impedance CD input: 150mV/30kohm
THD 0.004% (20Hz - 20kHz, 55W, 8ohm)
A dynamic characteristic / dynamic power
((Below) TIM distorted measurement full limits)
350W (2ohms)
275W (4ohms)
170W (8ohms)
Output bandwidth 5Hz - 100kHz (Output 55W, 0.5%, 8ohms)
Line-in frequency response 4Hz - 150kHz, and +0 -3dB (1W, 8ohm)
Output load impedance 0.1ohm or less
Output terminal Speaker: AorB:6-16ohm, A+B:12-16ohm
(B terminal is a direct connection)
Headset-jack maximum except take-off: 550mW (8ohms), 8-400-ohm conformity
<An interface / the DAC section>
A digital-input/output level / impedance Same axle: 0.5 Vp-p/75ohms
Standard light input: One line
Frequency response (0dB) 5Hz-20kHz}0.3dB
Signal to noise ratio (dB for zero, 1kHz) 105dB
Dynamic range (1kHz) 100dB
THD (0dB, 1kHz) 0.0025% or less
<Preamplifier part>
Input sensitivity/impedance Phono MM: 2.5mV/47kohm
Phono MC: 0.2mV/100 ohms
CD, Tuner, AUX1, 2, Tape1, 2, 3(PB):150mV /, 30kohm
The maximum except take-off/Output power 8V/150mV
THD 0.002% (MM, 1kHz, 8V)
RIAA deflection 20Hz-100kHz}0.3dB (MC IN)
<Synthesis>
Signal to noise ratio
(an input short circuit, the auditory sensation weighting A)
Phono MM:88dB
Phono MC: 69dB (at the time of a 0.25mV input)
Line: 108dB
Tone control characteristic Bass: }8dB (100Hz)
Treble: }8dB (10kHz)
The Subsonic Filter for Phono 16Hz, -12 dB/oct
Loudness control characteristic 100Hz:+6dB
10kHz:+6dB
Muting switch -20dB
Power supply voltage AC100V, 50Hz/60Hz
Power consumption 216W
Dimensions
(it is an included about a base, a knob, and a terminal)
Width 434x height 172x depth of 395mm
Weight 15.7kg