Audio Database

The

DENON PMA-2000III
100,000yen(January, 2000 release)

Description
 
The Integrated Amplifier which aimed at correspondence to a next-generation audio by improving PMA-2000II.

UHC-MOS which 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.
Furthermore, the 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 operation.
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.

Precision Mechanical 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 taken.

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.

The 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.

Rear
Internal
UHC-MOS
Power
Block
Schottky

Rating of a mode
Form Integrated Amplifier
<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%)
THD 0.01% (Output-power-3dB o'clock, 1kHz, 8ohms)
Speaker output terminal Speaker AorB: 4ohms - 16ohms
Speaker A+B: 8ohm-16ohm
Bi-wiring load: 4ohms - 16ohms
<Preamplifier part>
Equalizer amplifier output Rec out:150mV
Input sensitivity/impedance Phono MM: 2.5mV/47kohm
Phono MC: 0.2mV/100 ohms
Line: 140mV/70kohm (Source-Direct-off)
140mV/30kohm (Source-Direct-on)
RIAA deflection Phono: 20Hz-20kHz±0.5dB
Pre-out output 1V (line system input [, such as CD, ] and 100mV of incoming signal o'clock)
<Synthesis>
Frequency response 5Hz-100kHz+0 -3 dB
Signal to noise ratio (A network)
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)
Line:110dB
Tone control Bass: ±8dB (100Hz)
Treble: ±8dB (10kHz)
Power receptacle switched: Two lines, the sum total capacity 120W
unswitched: One line, capacity 240W
Power supply voltage AC100V, 50Hz/60Hz
Power consumption 275W
Dimensions (a base, a knob, a terminal included ) Width 434x height 180x depth of 478mm
Weight 22.0kg