The highest-class thermionic-tube Integrated
Amplifier of the black face of No. 1 of an SANSUI.
It was put on the market
at the time when the thermionic tube and a transistor interchange exactly, and
the SANSUI end was used and it was put on the market as a thermionic-tube
Integrated Amplifier of the highest peak.
6L6goal concept is adopted as
an output tube, and it is made to operate by an AB1PP fixed-bias
Moreover, the flat property has been acquired over all the bands
with the stream composition of the multiplex negative feedback circuitry.
Super-wide band type output and a constant loss have adopted as a
transformer the power transformer which was excellent in the regulation few.
Permanent security was all of these transformers carried out.
The amplifying circuits of a four-step stream composition including a cathode
follower are used for a control amplifier part.
Moreover, all are
constituted from NF amplifier and the noise is stopped.
It is designed
so that a preamplifier part and a main-amplifier part can use it independently,
Low-pass has adopted the tone control from which a going up point and a
descending point are changed to two steps and a total of four steps in
which the number of high regions is two.
It becomes independent about each high region low-pass, and a defeet (tone
circuitry cancellation unit) is also freely possible.
It is combination with the input transformer (A-603,
A-604) of an SANSUI, and is an enable also in MC type cartridge of a low power
Head amplifier has also adopted a new style silicon transistor
The first rank of middle amplifier has adopted the cathode
follower circuitry where an input impedance is high and an Output load impedance
Two kinds of tapes equalizers.
The low-impedance tape
recording output-terminal by a cathode follower.
The low high filter of
CR feedback scheme.
Two kinds of center
output-terminals of the ashes and the cut all the objects for bands, and for 3D
The presence control which improves crisp [ of a bass region ].
Accessories, such as a tapes monitor, a phase change, a subvolume, and a
headphone jack, are carried.
||Music power (IHFM): 96W
Stereo effective output (both channel operation): 40W+40W
|Cross modulation distortion (50Hz - 5.5kHz)
|Power Band Width (IHFM)
||20Hz - 20kHz (at 0.8%)
|A hum and a noise (IHFM)
|Input sensitivity/impedance (an effective
||1:0.06 mv/3.5ohms (A-604 using) of Phono
2:0.2 mV Phono/30ohm-100ohm (A-603 using)
Tape Head(19 cm/s 9.5 cm/s):
1.8mV / 100kohm
Tuner, AUX, Tape Monitor:220mV /, 500kohm
|Sound-recording output (Pin cathode-follower
||They are 100 times to Phono2 input.
are 115 times to a Tape Head input.
|Center channel output
||1.5V / 48kohm (at the time of an effective
Tape Head:NAB (19 cm/s,
||2.1V/710 ohm (at the time of an effective
||Low:Defeat, 250Hz, 500Hz
||250Hz o'clock: +11.5dB--10dB
||5kHz o'clock: +12.5dB--11dB
|Loudness control (Volume-30dB o'clock)
||50Hz : +9.5dB, 10kHz : +5dB
|A high filter
||20kHz-25dB, fo = 6kHz
|A low filter
||20Hz-26dB, fo = 125Hz
|The semiconductor used etc.
Transistor 2SC-402:2 piece
|Thermionic tube (12 pieces)
||6L6goal concept: Four pieces
12BH7A: Two pieces
|Diode (three pieces)
||SW-0.5a: One piece
SW-0.5d: Two pieces
||Width 460x height 170(rubber r) x depth of