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.
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
Furthermore, top covering which took the measures against
vibrationproofing, and the volume knob which deterred vibration with high mass
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.
eliminated the influence on the sound quality by each interference between
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.
|<Power amplifier part>
|Output power (both channel drive)
|80W+80W (8 ohms, 20Hz - 20kHz, THD 0.07%)
160W+160W (4 ohms, 1kHz, THD 0.7%)
||0.01% (Output-power-3dB o'clock, 1kHz,
|Speaker output terminal
||Speaker AorB: 4ohms - 16ohms
Bi-wiring load: 4ohms - 16ohms
||Stereo headphone conformity
|Equalizer amplifier output
||Rec out: 150mV of rating
||Phono MM: 2.5mV/47kohm
Line: 140mV/70kohm (Source-Direct-off)
||1V (line system input [, such as CD, ] and
100mV of incoming signal o'clock)
|Signal to noise ratio (A network)
terminal short circuit
|Phono MM: 91dB (at the time of a 5mV input)
Phono MC: 76dB (at the time of a 0.5mV input)
||Bass: ±8dB (100Hz)
Treble: ±8dB (10kHz)
||switched: Two lines, the sum total capacity
unswitched: One line, capacity 240W
|Power supply voltage
|Dimensions (a base, a knob, terminal included )
||Width 434x height 180x depth of 478mm