Audio Database

The

DENON PMA-890D/PMA-890DG PMA-890D:89,800yen(1989 release)
PMA-890DG:93,800yen(1989 release)

Description
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The Integrated Amplifier which carries real 20bit S.L.C and an optical ClassA circuit.

The real 20-bit super linear converter of right-and-left channel independence is carried in the D/A converter.
Outstanding D/A conversion is performed in response to the 20-bit 8 time oversampling signal made from a digital filter.
Moreover, the difference among sampling frequencies, such as CD, DAT, and satellite broadcasting, is identified automatically in a digital multi-interface circuit. Furthermore, the internal clock required for a recovery was made 2powerful PLL composition, and the influence of Gitta (time fluctuation of a digital signal) is lost.

The P.B.S (Penta Block Separated) chassis structure where the inside of amplifier was divided into 5 blocks for every basic circuit is adopted,The magnetic flux of a power-source block and the digital noise of a digital block and a display block have prevented jumping in to other circuits.
Furthermore, interference with a very small signal part and the Taishin number part is solved, and an unnecessary fine vibration is simultaneously suppressed by the large improvement in chassis rigidity.

The optical ClassA circuit is newly carried in the power amplifier part.
This circuit is a Class-A circuit which uses an optical element for transmission of the control signal sent to a bias circuit from a bias control circuit, and has eliminated the mutual intervention between the main signal system and a bias controlling circuit.
Moreover, a voltage magnification stage important for the drive of an electric power magnification stage adopts three steps of differential amplification, the first rank adopts ultra-low-noise FET, low-noise-izing and direct-current amplifier-ization are attained, and the final stage of power amplifier is using the high speed and the mass transistor of Pc80W by the parallel push pull.

The power-source part is what heightened instant response capability.
A 6.3kg heavy weight class large-sized shield power transformer is adopted as a power transformer, and the pure dynamic circuit of adoption of high-class and large-sized a commutator and an electrolytic condenser and 2-2 system which intercepts a power-source noise is carried.

The wide-range MC/MM equalizer amplifier which adopted direct-current servo system is carried.

The Source-Direct switch which can link all the input sauce with power amplifier directly, broadband real-time tone control and the speaker terminal change of a protection relay system, and the reset type high-speed protection circuit are carried.

There were a gold type and a black type with side wood.

The
Internal

Rating of a mode
Form Digital multi-interface loading Integrated Amplifier
<Power amplifier part (Line terminal -> SP terminal)>
Output power (20Hz - 20kHz) 130W+130W (6ohms)
110W+110W (8ohms)
Input sensitivity/impedance CD input: 150mV/30kohm
THD 0.004% (20Hz - 20kHz, 55W, 8ohm)
Dynamic power 350W (2ohms)
275W (4ohms)
170W (8ohms)
TIM distortion Below measurement full limits
Output bandwidth 5Hz - 100kHz (Output 55W, 0.5%, 8ohms)
Line-in frequency response 4Hz - 150kHz, and +0 -3 dB (outputs 1W and 8ohm)
Output load impedance 0.1ohm or less
Output terminal Speaker: AorB:6-16ohm, A+B:12-16ohm
Headset-jack maximum except take-off: 430mW (8ohms), 8-400-ohm conformity
<A digital interface / the DAC section>
A digital-input/output level / impedance 0.5 Vp-p/75ohm same axle
Standard light input: Two lines
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%
<Preamplifier part>
Input sensitivity/impedance Phono MM: 2.5mV/47kohm
Phono MC: 0.2mV/100 ohms
CD, AUX, Tuner, Tape1, 2PB:150mV/30kohm
The maximum except take-off/Output power 8V/150mV
THD 0.002% (MM, 1kHz, 8V)
Equalizer (RIAA) deflection 20Hz-50kHz}0.3dB (MC IN)
<Synthesis>
Signal to noise ratio
(an input short circuit, the auditory sensation weighting A)
Phono MM:82dB
Phono MC: 62dB (at the time of a 0.25mV input)
Line:108dB
Tone control characteristic Bass: }8dB (100Hz)
Treble: }8dB (10kHz)
Subsonic Filter 16Hz, -12 dB/oct
Loudness control characteristic 100Hz:+6dB
10kHz:+6dB
Muting switch -20dB
Power consumption
(Electrical Appliance and Material Control Law)
216W
Power source AC100V, 50Hz/60Hz
Dimensions
(Includeds, such as a foot, a knob, and a terminal)
PMA-890D: Width 434x height 180x depth of 420mm
PMA-890DG: Width 470x height 181x depth of 420mm
Weight PMA-890D:18kg
PMA-890DG:19.4kg