The Integrated Amplifier which carries wireless remote control in PMA-2000III.
It is designed not sacrifice the sound quality and the engine
performance of PMA-2000III by becoming remote control correspondence.
remote control, operation of the change of main volume and input sauce, muting, and power-source on/off (two AC outlet linkage) is possible.
player of DENON can also be operated.
Independent loading of the power
transformer only for a microcomputer is carried out.
Moreover, when not
controlling, the microcomputer stop mode which stops all the operation of a
microcomputer and prevents inflow of a noise is adopted.
is a large current type magnification element is adopted as an output stage, and
the UHC single push pull circuit has realized coexistence of delicate power of
expression and high power.
Each of the volume circuit, the tone circuit, and the power amplifier circuit was improved, and the maximum of the frequency
response at the time of real use is improved to 100kHz. Furthermore, the noise
generated within amplifier at the time of real use was stopped by improving a
volume circuit, and the resolving power corresponding to a next-generation audio
has been obtained.
a magnetic circuit and the twin transformer parallel
connection which improves the characteristic of each winding wire circuit are adopted. Moreover, the leakage flux of the power transformer which is a noise
source in amplifier is reduced by making influence of magnetic etc. into the
L.C. (Leakage Cancelling) mount system canceled mutually.
floating effect was further heightened by adopting a new gum elastic as the
floating structure which combined special rubber, special resin, and the sheet
steel, and the bad influence by vibration of a transformer is prevented.
The Schottky barrier diode developed for high frequency rectification is
carried in the power-source part. Little play of the noise is enabled by the
low-noise characteristic and the large current characteristic by high-speed
Furthermore, it is considered as the circuit which can supply a
power source with a margin in all the zones of play frequency by carrying
dynamic resistance combining the power transformer reduced sharply and the
capacitor by which a mass electrolytic condenser differs from frequency.
In order to reduce inflow of noise current, such as a constant current
circuit, to the grand circuit used as the origin/datum of signal magnification,
the Precision Signal Ground circuit is carried.
Ground structure is adopted and other decreases of oscillating, such as a power
transformer, and interference of the oscillating course are suppressed by
carrying out direct attachment of the radiator dumped by the gum elastic and the
radiator stabilizer at the nearness of FOOT.
Furthermore, measures against
vibrationproofing, such as a volume knob which suppresses vibration with top
covering which took the measures against vibrationproofing, or high mass, are
In order to suppress sound quality degradation by the mutual
intervention between circuits, or inflow of a noise, the power amplifier block
was considered as the twin monophonic composition made to become independent by
right and left, and also the circuit where signal levels differ was also
separated, and 6 block structures which put cover into practice are adopted.
in the speaker terminal, brass shaving appearance is carried out, it
plates with gold at a part, and the transmission loss is suppressed. Moreover,
the very-thick speaker cable is also supported by setting the bore diameter of a
clamp part to phi6mm.
Those with two line and bi-wiring connection are also
possible for a speaker terminal.
The first rank circuit of discrete
composition of having used low-noise FET is adopted as a phone equalizer part.
Moreover, high-quality sound-ization is attained by the regulated power supply
only for a phone equalizer.
Both of the cartridges of MM/MC are supported by
the change of a switch.
The Pre out terminal is carried.
SILMIC II electrolytic condenser was begun and the part which the power
radiator excellent in the heat dissipation effect, OFC internal wiring material, an inactive gas enclosure relay, high-quality sound carbon resistance, etc.
selected carefully is adopted.
The attachment-and-detachment type is
adopted as a power cord.
|<Power amplifier part>
|Output power (both channel drive, CD->SP OUT)
||80W+80W (8 ohms, 20Hz - 20kHz, THD 0.07%)
160W+160W (4 ohms, 1kHz, THD 0.7%)
||0.01% (Output-power-3dB o'clock, 1kHz,
|Speaker output terminal
||Speaker AorB: 4ohms - 16ohms
Bi-wiring load: 4ohms - 16ohms
|Equalizer amplifier output
||Phono MM: 2.5mV/47kohm
Line: 140mV/70kohm (Source-Direct-off)
||1V (line system input [, such as CD, ] and
100mV of incoming signal o'clock)
||5Hz-100kHz+0 -3 dB
|Signal to noise ratio
(A network, an input terminal short circuit)
|Phono MM: 91dB (at the time of a 5mV input)
Phono MC: 76dB (at the time of a 0.5mV input)
||Bass: ±8dB (100Hz)
Treble: ±8dB (10kHz)
||switched: Two lines, the sum total capacity
unswitched: One line, capacity 240W
|Power supply voltage
|Dimensions (a base, a knob, a terminal
||Width 434x height 180x depth of 478mm
|Attachment: Wireless remote
||Width 56x height 105x depth of 19mm