Audio Database

The

DENON PMA-S10II
230,000yen(February, 1997 release)

Description
@
The Integrated Amplifier which adopted UHC single push pull composition.

The UHC single push pull circuit using large current type magnification element UHC-MOS is adopted.
Current supply capability has been improved a bipolar transistor and more than equivalent, and since UHC-MOS also has the sound quality merit of MOS-FET, it has solved the problem with which power of expression and speaker drive power disagree.

The power transformer is improving the flattery nature to the music signal which has a large dynamic range to a magnetic saturation domain by using a large-sized magnetism circuit with low magnetic flux density. Moreover, the leakage flux which is a noise source in amplifier is sharply reduced by adoption of LC mount system.
Furthermore, the mutual intervention between each circuit is suppressed by becoming independent about the winding wire of the power source of a voltage magnification stage or a phone equalizer, and making the transformer of the control circuit power source which controls a signal relay etc. become independent.

In order to suppress sound quality degradation by the mutual intervention between circuits, or inflow of a noise, 6 block structures which separated the twin monophonic composition which achieved right-and-left independence of the power amplifier block, and the circuit where signal levels differ, and put cover into practice are adopted.
Moreover, in order to suppress generating of the noise by vibration, the chassis is performing and using black paint for the sheet steel with a thickness of 1.6mm of the same grade as separate amplifier.
Furthermore, the laminated structure excellent in the oscillating damping characteristic which combined a different material is adopted as a power transformer attachment. And the high rigidity and vibration proof which suppress vibration generated from a power transformer are secured.

The sintered alloy which changes vibration into heat and controls the propagation to a chassis is used for an insulator. Furthermore, the new materials which absorb vibration are stuck and propagation of vibration is suppressed.

in the speaker terminal, brass shaving appearance is carried out, it plates with gold at a part, and the transmission loss is reduced.
Moreover, the bore diameter of a clamp part is made large-sized with phi6mm, and correspondence to a very-thick speaker cable is aimed at.

In addition to the outstanding large current supply capacity, the large current first recovery diode which has improved the loss of working speed and voltage sharply is adopted as the rectifier circuit of a power-source part by parallel connection.
Furthermore, the improvement of the characteristic is aimed at with the combination of the film capacitor with which the mass high-quality sound electrolytic condenser which uses low impedance electrode foil differs from a frequency response.
Moreover, the wiring from a power transformer output to a power amplifier output stage uses the OFC wiring material of a very thick, and is suppressing energy loss to the minimum.

The first rank circuit of discrete composition of having used low-noise FET is adopted as a phone equalizer part.
Moreover, the improvement of sound quality is aimed at by preparing the regulated power supply only for a phone equalizer.

large-sized shaving appearance of the 40 type 4-unit volume is begun and carried out, and parts adopted in S1 series, such as the AC cord a gilding pin jack, OFC internal wiring material, an inactive gas enclosure type relay, a high-quality sound capacitor, and attachment-and-detachment type, are used.

Rear
Internal
The
Power
UHC-MOS Power

Rating of a mode
Form Integrated Amplifier
<Power amplifier part>
Output power
(Both ch(es) drive, CD->SP out)
100W+100W (8 ohms, 20Hz - 20kHz, THD 0.07%)
200W+200W (4 ohms, 1kHz, THD 0.7%)
THD 0.01% (Output-power-3dB o'clock, 8 ohms, 1kHz)
Output terminal Speaker AorB: 4ohms - 16ohms
Speaker A+B: 8ohm-16ohm
At the time of bi-wiring: 4ohms - 16ohms
<Preamplifier part>
Input sensitivity/impedance Line: 150mV/47kohm (Source Direct off)
150mV/15kohm (Source Direct on)
Phono MM: 2.5mV/47kohm
Phono MC: 0.2mV/100 ohms
Equalizer amplifier output 150mV
RIAA deflection Phono MM: 20Hz-20kHz}0.3dB
Phono MC: 30Hz-20kHz}0.5dB
<Synthesis>
Signal to noise ratio (A network)
At the time of an input terminal short circuit
Line:110dB
Phono MM: 91dB (at the time of a 5mV input)
Phono MC: 78dB (at the time of a 0.5mV input)
Tone control Bass: }8dB (100Hz)
Treble: }8dB (10kHz)
Power receptacle switched: Two lines, a total of 120W
unswitched: One line, 240W
Power supply voltage AC100V, 50Hz/60Hz
Power consumption 300W
Dimensions (a base, a knob, a terminal included) Width 434x height 181x depth of 485mm
Weight 30.0kg