Audio Database

The

DENON PMA-1500RII
68,000yen(2000 release)

Description
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The Integrated Amplifier to which improvement corresponding to a next-generation audio was performed based on PMA-1500R.

The power amplifier circuit etc. was improved and the maximum of the frequency response at the time of real use is improved to 100kHz.
Furthermore, by using low impedance volume, the noise generated within amplifier at the time of real use is reduced, and resolving power is raised.

Since high-quality-sound-izing and speaker drive capability are compatible with the magnification element of the minimum unit, large current type magnification element UHC-MOS has been adopted as a magnification element. Power of expression and high power are reconciled by the single push pull circuit using UHC-MOS.

The twin transformer parallel connection which improves the characteristic of a magnetic circuit and each winding wire sharply is adopted.
Moreover, by making influence of magnetic etc. into the L.C. (Leakage Cancelling) mount system canceled mutually, the leakage flux of the power transformer which is a noise source in amplifier was reduced, and improvement in current supply capability and low-noise-ization are realized.

The Schottky barrier diode adopted by PMA-2000III etc. is adopted as a rectifier circuit. The sound quality which stopped the noise more has been obtained by the low-noise characteristic and the large current characteristic by high-speed operation.

The independent composition of a power amplifier block is begun and sound quality degradation by the mutual intervention between circuits or inflow of a noise is suppressed by making it the block structure which also separated the circuit where other signal levels differ.
Moreover, the influence on the sound quality by the interference during each block, such as adding a radiator stabilizer to the power amplifier part radiator which is easy to be influenced by vibration, is eliminated.
Moreover, since a chassis examines and adopts the thickness of the sheet steel and also puts deterrence of vibration into practice, it is made into the transformer base sheet steel and the combination of special resin.

In order to stop the power consumption by the standby at the time of remote power-off, the power transformer for exclusive use is carried in each of a microcomputer circuit and an audio circuit. This has eliminated not only reduction of the power consumption at the time of standby but the interference with the microcomputer to an audio circuit.

While hearing it, when a microcomputer does not control, the microcomputer stop mode which stops all the operation of a microcomputer automatically is carried. While this is usually hearing it, the clock oscillation of the microcomputer stopped and inflow of the noise to an audio system is canceled.

brass shaving appearance of the speaker terminal is carried out, it plates with gold at a part, and is reducing the transmission loss. Moreover, the large-sized speaker cable is also supported by setting the bore diameter of a clamp part to phi6mm.
Furthermore, bi-wiring connection is possible for two speaker terminals.

The phone equalizer part has composition which adopted low-noise FET as the first rank circuit of discrete composition.
Moreover, the cartridge of each MM/MC is supported by switch change.

The pre-out terminal is carried.

Parts, such as a gilding terminal, high-quality sound carbon resistance, a capacitor, are adopted.
Moreover, the attachment-and-detachment type is adopted as a power cord.

System remote control is attached and CD of DENON, MD, the cassette deck, and the tuner are also supported.
Moreover, the independent power transformer is adopted as controlling-circuit power sources, such as remote control, and the interference to an audio circuit is reduced.

The
Rear
Internal
Power
Microcomputer
Use
UHC-MOS FET Schottky

Rating of a mode
Form Integrated Amplifier
<Power amplifier part>
Output power (both channel drive, CD->SP out) 70W+70W (8 ohms, 20Hz - 20kHz, THD 0.07%)
140W+140W (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>
Input sensitivity/impedance Phono MM: 2.5mV/47kohm
Phono MC: 0.2mV/100 ohms
Line: 150mV/47kohm (Source-Direct-off)
150mV/13kohm (Source-Direct-on)
RIAA deflection MM: 20Hz-20kHz}0.5dB
MC: 30Hz-20kHz}0.5dB
Output power Equalizer amplifier output: 150mV
<Synthesis>
Frequency response 5Hz-100kHz+0 -3 dB
Signal to noise ratio (the auditory sensation weighting A, input 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: Three lines, the sum total capacity 120W
Power supply voltage AC100V, 50Hz/60Hz
Power consumption 250W
At the time of standby: Abbreviation 2W
Dimensions (a base, a knob, a terminal included) Width 434x height 134x depth of 407mm
Weight 14.6kg
Attachment System remote control