Audio Database

PMA-S10
Commentary

This pre-main amplifier inherits the design philosophy of the POA-S1 and PMA-S1, and achieves a high level balance between delicacy and strength.

The amplifier uses a high-current amplifier UHC MOS.
The current supply capability of the UHC MOS is improved to be equal to or higher than that of the bipolar transistor, and the UHC MOS has the advantage of the sound quality of the MOS FET.
In addition, the cascode bootstrap method is adopted in order to bring out the maximum capability of this element.
The cascode bootstrap method provides an ideal load to the power amplifier stage and achieves a simple and straight configuration.
In addition, the source resistance, which has been a cause of contamination of sound quality, is eliminated by taking advantage of the stability of UHC MOS.

The power supply section uses a large power transformer and a large block capacitor to enhance the power and stability of the UHC single push-pull circuit.

The chassis is made of a rigid steel plate with excellent shielding and copper plating.
In addition, the sintered alloy insulator is fixed directly to the chassis to improve the vibration isolation structure.

The Phono equalizer supports both MM and MC types.

To simplify and straighten the signal path, we have a トーンデ foot switch that completely separates the tone circuit from the signal path and enables straight playback when the tone control is not in use.

Model Rating
Type Pre-main amplifier
Power Amplifier Unit
Rated output 100W + 100W (4 Ω)
50W + 50W (8 Ω, 20 Hz to 20 kHz)
Total harmonic distortion factor 0.07% (1 kHz, 8 Ω)
Speaker output terminal 4 Ω ~ 16 Ω
Preamplifier Section
Input Sensitivity / Impedance Phono MM : 2.5mV/47k Ω
Phono MC : 200 μ V/100 Ω
Line : 150mV/25k Ω
Equalizer amplifier output Rec Out : Rated output 150 mV
RIAA deviation Phono : 20 Hz to 20 kHz ± 0.3 dB
<General>
Signal-to-noise ratio Phono MM:91dB
Phono MC:76dB
Line:102dB
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 160W
External dimensions Width 434x Height 137x Depth 365 mm
Weight 15.2kg