Audio Database


100,000yen(around the 1996 time)

The Integrated Amplifier which inherited the design philosophy of high-end audio S1 series, and technology.

A large current type magnification element UHC MOS called peak current 120A is adopted as an output stage.
Current supply capacity has been improved a bipolar transistor and more than equivalent, and UHC MOS is the prevention which also unites and has a sound quality merit of MOS FET, carried this UHC MOS with single push pull composition, and has canceled the variation in magnification operation.

The twin transformer parallel connection which improves sharply the characteristic of each magnetic circuit and winding wire circuit developed by monophonic power amplifier POA-S1 is adopted.
Moreover, by considering influence of magnetic etc. as L canceled mutually and C mount, the leakage flux of the power transformer which is a noise source in amplifier was reduced, and high current supply capability and low-noise-ization are realized.

The large-sized rectification diode excellent in large current supply capacity and the Hearst recovery diode which has improved working speed sharply are connected to a rectifier circuit in parallel, and a high speed and large current are supported so that better operation can be obtained.
Furthermore, it carries in the power source capacitor in which a direct-current power source is stored combining the film capacitor with which a mass high-quality sound electrolytic capacitor differs from a frequency response, and current supply stabilized in all the zones of play frequency is enabled.

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 L/R independence, and also 6 block structures which also separated the circuit where other signal levels differ are adopted.
This eliminated the influence on the sound quality by the interference during each block, and the more excellent play is realized.
Moreover, since the 1.6-mm-thick sheet steel is used for a chassis in order to secure high rigidity, and also deterrence of vibration is put into practice, it is a chassis which adds a transformer base to a power transformer part, and has a tough structure of 3.2mm in thickness.

it is brass shaving, and resembled the speaker terminal, gilding processing was performed, and more reliable connection is made.
Moreover, two lines are prepared and bi-wiring is supported.

The phone equalizer which adopted the first rank circuit of discrete composition of having used low-noise FET is carried.
Both of the cartridges, MM and MC, can be used by the change of a switch.

Large-sized (27 type) volume was begun and OFC internal wiring material, an inactive gas enclosure type relay, high-quality sound carbon resistance, a high-quality sound condenser, etc. have adopted the reliable part.

Internal UHC-MOS

Rating of a mode
Form Integrated Amplifier
<Power amplifier part>
Output power (both channel drive)
160W+160W (4 ohms, 1kHz, THD 0.7%)
80W+80W (8 ohms, 20Hz - 20kHz, THD 0.07%)
THD 0.01% (Output-power-3dB o'clock, 1kHz, 8ohms)
Speaker output terminal A, B:4ohms - 16ohms
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: 150mV/47kohm (Source-Direct-off)
150mV/13kohm (Source-Direct-on)
RIAA deflection Phono: 20Hz-20kHz±0.5dB
Signal to noise ratio (A network) Phono MM: 91dB (input terminal short circuit and 5mV of incoming signal o'clock)
Phono MC: 76dB (input terminal short circuit and 0.5mV of incoming signal o'clock)
CD, Tuner, DVD/Aux, Aux2, Tape1/Tape2 [ DAT and ]/MD: 110dB (input terminal short circuit)
Tone control Bass: 100Hz, ±8dB
Treble: 10kHz, ±8dB
Power receptacle Switched (linkage): Two lines, the sum total capacity 120W
Unswitched (un-interlocking): One line, capacity 240W
Power supply voltage AC100V, 50Hz/60Hz
Power consumption 250W
Dimensions Width 434x height 180x depth of 478mm
Weight 20.0kg