Audio Database

The

DENON PMA-2000II
100,000yen(1998 release)

Description
 
The Integrated Amplifier which improved based on PMA-2000 and applied the polish to sound quality.

Large current type magnification element UHC-MOS with 3 to 10 times [ usual ] as many current supply capacity called peak current 120A is adopted as an output stage. The variation in magnification operation is canceled by carrying this UHC-MOS with single push pull composition.

The large current type ultra high-speed rectification diode was used for the power-source part, further, the core stacked compared with PMA-2000, the winding wire cross-sectional area was raised for thickness about 40% about 20%, and the newly developed power transformer that reduced dynamic resistance sharply is adopted. Moreover, a power source capacitor is carried combining a mass high-quality sound electrolytic condenser and the plain foil capacitor by which frequency differs, and is aiming at improvement in current supply capacity.
Furthermore, the twin transformer parallel connection which improves sharply the characteristic of each magnetic circuit and winding wire circuit is adopted as a transformer part,By considering influence of magnetic etc. as the L.C (Leakage Canceling) mount canceled mutually, the leakage flux of the power transformer which is a noise source in amplifier is reduced, and improvement of current supply capability and low-noise-ization are attained.

Precision Mechanical Ground structure is adopted,Interference of other sources of vibration, such as a power transformer, and an oscillating course is suppressed by carrying out direct attachment of the radiator dumped by the gum elastic and the radiator stabilizer at the close bottom of newly developed FOOT with high vibration suppression nature.
Moreover, attachment of a power transformer is also made into the floating structure which combined special rubber, special resin, and the sheet steel, and the influence of vibration from a transformer is reduced.
Furthermore, top covering which took the measures against vibrationproofing, and the volume knob which deterred vibration with high mass are adopted.

Inflow of the noise signal from a constant current circuit is suppressed, and the Precision Signal Ground circuit which omits current other than signal current is carried.

In order to cancel degradation of the sound quality by the mutual intervention between circuits, or inflow of a noise, the power amplifier block was considered as the twin monophonic composition which achieved right-and-left independence, and 6 block structures which also separated the circuit where other signal levels differ are adopted.
This has eliminated the influence on the sound quality by each interference between blocks.

The first rank circuit of discrete composition of having used low-noise FET is adopted as a phone equalizer part.
MM/MC -- both of the cartridges are supported.

The pre-out terminal is carried.

While raising the thickness of a base portion 20% compared with PMA-2000,By performing black alumite processing, the power radiator which has improved the heat dissipation effect sharply, the transformer only for a control system, OFC internal wiring material, an inactive gas enclosure type relay, high-quality sound carbon resistance / capacitor, etc. are selecting carefully and using the part.

bi-wiring correspondence carried out large-sized brass shaving appearance, and the speaker terminal and the AC inlet type power cord are adopted.

Rear
Internal
Power
Power
Large
UHC-MOS Precision Signal Ground circuit

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
Headphone Stereo headphone conformity
<Preamplifier part>
Equalizer amplifier output Rec out: 150mV of rating
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>
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 250W
Dimensions (a base, a knob, terminal included ) Width 434x height 180x depth of 478mm
Weight 22kg