|118,000yen(around the 1985 time)
The Integrated Amplifier which carries dual super a unreturned circuit.
In PMA-960, the dual super unreturned circuit which raised the
completeness of the non-feedback system is carried.
This circuit consists of
distortion servo circuits which negate distortion mutually and suit it with each
transistor of N channel of a power stage, and P channel.
in order that the
feature of dual super a unreturned circuit may not have a NFB loop which returns
a signal to an input side, the transmission speed of a signal presses the speed
of an original nakedness circuit for it, and if there is no dynamic distorted
generating which affects the Hearing impression quality greatly, it will be acquired, and are things. Moreover, theoretically static-distortion is made into
zero and there is also an advantage that a slew rate can be made high.
Furthermore, in the high dual super unreturned circuit of the removal
effect, it has the distorted removal effect which was excellent to a high order
higher-harmonic-wave distorted domain of 20kHz or more,In addition, in order
that there may be no NFB loop, the influence of the back electromotive force
etc. does not reach voltage magnification stages (pre-driver stage etc.) at the
time of speaker connection, either, but it has various merits -- there is no
dynamic distorted generating.
High speed-ization of weight flat
amplifier was thoroughly carried out to CD play, and improvement in a slew rate
Moreover, the substantial composition, such as all the signal
course perfect Capacitor-Lesses (perfect direct-current composition) and non
switching Class-A electric power magnification, is adopted.
It is used
for it, carrying out parallel connection of the power transistor of Pc130W to an
Moreover, the large-sized toroidal transformer of 390VA, four newly developed phi50x100mm block capacitors for audios (12,000micro-Fx4), and a fast recovery diode are adopted as a power-source part. Especially a block capacitor is arranging according to a right-and-left channel near the output stage, and is suppressing the mutual intervention.
The differential amplification circuit by low-noise FET is adopted as the
first rank, and it has become the parallel connected broadband design at
the equalizer amplifier part. moreover, the high region by high impedance
cartridges, such as MM type cartridge, -- the circuit system which suppresses
a distorted increase is adopted.
Moreover, the allowable input
is improved by the establishment meter circuit which raised service voltage
conventional ratio about 20% by adoption of newly developed high proof-pressure
The input terminal only for DAD which connects CD player etc. is
The broadband real-time tone control with a turnover change is
The high-speed protection circuit is carried.
phi0.26mmx37 cord which displayed polarity is adopted as a power cord.
Two kinds of variations, black and champagne gold, occurred.
|<Power amplifier part (Tuner
-> SP out)>
(both channel drive, a sine wave continuation output)
|Cross modulation distortion
||0.002% or less
||Below measurement full limits
||More than }350v/microsec
|Output bandwidth (both channel drive)
||5Hz - 80kHz (THD 0.02%)
|Frequency response (at the time of 1W
||1Hz-250kHz+0 -3 dB
|Output load impedance (1kHz)
||Speaker AorB: 6ohms - 16ohms
Headset jack: 550mW/eight ohms
||Phono MM: 2.5mV/47kohm
Phono MC high:
Phono MC low: 0.125mV/100 ohms
DAD, Tuner, Aux,
|The maximum except take-off/Output power
||0.001% or less (1kHz, 8V)
|Signal to noise ratio (an input short
circuit, Weight A)
||Phono MM: 90dB (at the time of a 2.5mV
Phono MC: 75dB (at the time of a 0.25mV input)
DAC, Tuner, Aux,
Tape: 110dB (at the time of a 150mV input)
||Bass: }8dB (50Hz, 100Hz)
||18Hz, 6 dB/oct
|Loudness control characteristic
||Low-pass: +7dB (100Hz)
High region: +6dB
|Dimensions (a base, a knob, a terminal
||Width 470x height 168x depth of 440mm