|120,000yen(around the 1979 time)
DC power amplifier which adopted the diamond
The diamond differential circuit is adopted as the
The cascode and the dual complimentary diamond differential circuit by
bootstrap are used for the voltage differential-amplification circuitry
with the direct couple current source and the 2nd step of predrive stage
which use the Dual FET through which the first rank can send a large current
by a low-noise. And on the last power stage, NM transistor of SANSUI custom
is used and it constitutes from an electric-current differential push-pull
Little transmit with 2pole phase compensator and an interval
distorted to a high region is realized.
The large-sized EI transformer
is arranged in the center of a chassis at the power-source part.
transformer saves the positive operation also in the time of full power by
right-and-left independent 2 coil and two rectifier circuits.
Moreover, newly developed custom-made electrolytic capacitor 15,000 micro
Fx4 is adopted.
In order to diffuse the exothermic from a power transistor, the
heat dissipation is coped with by the chimney type large-sized heat sink and the
bonnet design which employs it efficiently.
The large-sized power meter
If the peek indicator is a meter scale (PAT.PEND) which embeds
peek meter between 0dB - +5dB and a peak level is detected, it carries out a
lighting operation and directs the peak value of a pulse signal, the music
source, etc. at a quick velocity.
In order to employ a diamond
differential circuit efficiently, the symmetrical monophonic construction is
It is a block location in alignment with the fluence of the signal.
Moreover, with the Out Put change-over switch which achieved the
right-and-left independency, the product line from the output transistor within
amplifier to an output-terminal is shortened, and the transmit loss is
suppressed to the minimum.
Right-and-left channel independent input
A power switch with a large-sized indicator.
Standby AC plug socket 2 circuitry (interlocking 100W un-interlocking 200W).
Large-sized grounding terminal.
EIA specification rack-mounted
||Stereo DC power amplifier
|Effective output (both ch(es) operation)
||110W+110W (8 ohms, 10Hz - 20kHz, THD 0.008%)
110W+110W (8 ohms, 1kHz, THD 0.003%)
|THD (10Hz - 20kHz)
||0.008% or less (8ohms)
|Cross modulation distortion (70Hz:7kHz=4:1)
||0.008% or less (8ohms)
|Output bandwidth (IHF, THD 0.02%, both
||3Hz - 70kHz (8ohms)
|Dumping factor (IHF, 1kHz, both channel operation)
|Frequency characteristic (1W)
|Input sensitivity/input impedance (1kHz)
|SN ratio (IHF, A network, a short circuit)
||125dB or more
|Channel separation (IHF)
||105dB or more (1kHz)
98dB or more
|The speaker used
A+B: More than 8ohm
|Power dissipation (Electrical Appliance and
Material Control Law)
||Width 430x height 187x depth of 430mm
With a rack-mounted adapter: Width 482x depth of 450mm
With a rack-mounted adapter: 20.3kg