|135,000yen(October, 1972 release)
The highest-class Integrated Amplifier which the
SANSUI completed based on the chosen part making full use of the highest
The stable whole page hardwired-connection OCL
pure complementary circuit is adopted the fully examined component partses and
by making full use of a technical expertise. Moreover, by adopting the parallel
push-pull circuit which is proud of the Oide power and a low distortion, from
5Hz to 40kHz, the THD, Cross modulation distortion, and Power Band Width from
the Koide power to the Oide power also had a margin, and have fully guaranteed
0.1% or less.
A large-sized power transformer and a 4x4,700-micro F mass
capacitor are used for a power-source part.
The drive which became
independent in the power stage and which adopted the +-2 power-source scheme,
raised stability, and had the allowance of a power transistor while carrying out
the powering is enabled for every channel.
Furthermore, the power stage and
the predrive stage are used as another power source, and the predrive stage is
made to drive on a voltage higher than the power stage. For this reason, the
drive stabilized without being influenced by the load variation is enabled.
The parallel push circuitry which can reduce the collector current of a
power transistor to conventional one half. In this circuitry, since only the
good fraction of the current characteristic of a transistor can be chosen, the
high output which the whole page hardwired-connection OCL pure complementary
circuit and the interval pressed down distortion, and was stabilized as for them
can be obtained.
Moreover, by considering the differential amplifier which
influences the stability of a whole page hardwired connection as the two-step
stream composition by the combination of a low-noise transistor, and carrying
out a constant current drive, it is designing so that a parallel push-pull
operation may be performed ideally.
The phase margin which plans the
stability of amplifier and which is considered as one measure is thought as
The robustness under all load-intensity requirements is
considered from the equalizer part to [ take greatly enough not only to
super-low-pass one but to a super-high region, and ] the main part.
to a fundamental wave, a wide range spectrum distribution is carried out, and a
character response is shown also to the signal of a pulsive music, and the
high-definition tone quality is made possible with the stable operation.
The three-step hardwired-connection equalizer circuitry of PNP-NPN-PNP
is used for an equalizer circuitry.
Furthermore, they are 300mV of maximum
permissible inputs by the high voltage supplied from the stable constant-voltage
regulated power supply.
Moreover, the RIAA deflection which has influence on
a tone quality has also guaranteed the value of ±0.5dB to the RIAA element in
30Hz - 15kHz by the low-noise transistor, little resistor with error, and a
The it1 noise generated at the time of a switchpoint switching
used - power source, and has solved it by setting base potential of the first
rank to 0.
When it becomes an overload, the collector current of an
output stage and the driver stage builds the current limiter circuit restricted
so that beyond a certain constant value may not flow in the protection of a
At the time of bads, a power transistor and a speaker are
protected with an immediate judgment fuse with the relay which combined the
Moreover, since the relay circuit serves as the audio
muting, there is no unpleasant pop noise at the time of power activation.
A bass and loud sound have adopted T.T.C. (triple tone control) of only
±5dB and the SANSUI from which an ideal curve is obtained by a 1dB step only
±15dB and inside sound at a 3dB step.
T.T.C. In order that amplifier may
secure a high input impedance to the first rank, low-noise FET is used for it
and it serves as NF type of the three-step hardwired connection and the two-step
The tone quality can make 150Hz of
basses, 300Hz, 600Hz, 6kHz of loud sounds, 3.5kHz, and 2kHz an elevation and a
descending point by a tone selector circuitry, and inside sound can be adjusted
to a total of nine steps focusing on 750Hz, 1.5kHz, and 3kHz.
has the defeet switchpoint and the defeet of the T.T.C. circuitry can be carried
out, respectively, and it is designed so that a flat property may be acquired.
The good exclusive NF type active filter circuit system of the piece of
12dB / oct can be adopted, and, as for a high filter, the low filter can change
a cut-off frequency to 12kHz and 6kHz at 25Hz and 50Hz.
There is no
variation of the frequency response in a mid range.
A sound recording
and a play monitor are possible for a tapes monitor circuitry to both those with
2 circuitries, and two simultaneously connected tape decks.
reprint can be freely performed from both of the tape decks with a tapes reprint
switchpoint. The monitor under reprint is also possible.
And a record, FM,
etc. can be ordinarily enjoyed from a speaker, reprinting.
four-channel stereo system can consist of connecting 4ch adapter.
using 4ch adapter, a tape deck is connected and a sound recording and a play
monitor are possible.
The tape deck linked to a tapes monitor circuitry to
tapes reprint is also possible.
N. By connecting R. (noise reduction)
adapter, tape hiss can be reduced and a Hi-Fi sound recording can be carried out
simultaneously at two connected tape decks.
Moreover, a play is a switchover
of a tapes monitor switchpoint and can be operated with both of the tape decks.
It is possible for A, B, and C to carry three speaker terminations, and
to switch independence, A+B, and A+C with a speaker switchpoint, respectively.
Two Phono inputs are carried, and it is designed so that Phono1 may
respond to 50kohms, Phono2 may respond to a cartridge and an input impedance may
be changed to three steps, 30kohms, 50kohm, and 100kohm.
part and a main-amplifier part can be independently used by removing the
connector of the rear panel.
Even if it does not use a volume, the
muting switch which can decrease all [ of 20dB ] the compasses is carried.
The level adjuster is taking lessons from Deck1, 2, and AUX, and it is
made by unification of each input level, and whenever it is a selector
changeover, the volume set which it is can be excluded.
interconnection of a high impedance type microphone -- right and left -- it can
The DIN connector which simplifies an interconnection of
a tape deck is carried.
Five positions of Stereo Reverse, Normal, Mono,
L+R, L, and R The mode selector is carried.
The loudness circuitry is
The headset jack is equipped two lines, and if one of them
inserts headphone, it is the design in which a speaker is turned off
Two grounding terminals are carried.
outlets of Switchedx2 and Unswitchedx2 are carried.
All thumbs are the
products made from an aluminum Naked.
||Music power (IHF): 260W (4ohm, 1kHz)
Effective output (one-side-channel operation): 85W/85W (8ohm, 1kHz)
Effective output (both channel operation): 80W+80W (8 ohm, 1kHz)
Succession effective output (both channel operation, the rated distortion
of 8 ohm, 20Hz - 20kHz): 75W+75W
|THD (Output power)
||0.1% or less
|Cross modulation distortion
||0.1% or less (an Output power,
|Power Band Width (IHF)
||5Hz - 40kHz
||3Hz - 80kHz, and +0 -1 dB (at the time of
main-amplifier and 1W output)
|Input sensitivity/input impedance
[maximum permissible input 300mV, THD 0.5%or less]
2.5mV / 50kohm
Tuner, AUX(level adjustment is possible):100mV /, 50kohm
Tape Monitor1, 2 (PIN) (level adjustment is possible):100mV / 50kohm
(DIN):100mV of Tape Monitor / 50kohm
4ch, N.R.Adaptor:100mV /, 50kohm
|An Output voltage/Output load impedance
||Tape Rec1, 2 (PIN):100mV / 1.5kohm
(DIN):30mV of Tape Rec / 70kohm
4ch, N.R.Adaptor:100mV /, 1.5kohm
Preamplifier (Output power): 0.8V/1.5kohm
[maximum output and THD 0.5%or
|Crosstalk (Output power 1kHz)
||Phono1, 2:50dB or more
|A hum and a noise (IHF)
||Phono1, 2:75dB or more
Tuner, AUX: 85dB
Main amplifier: 100dB or more
||Bass(Defeat, 150Hz, 300Hz, 600Hz): ±15dB
(20Hz), a 3dB step
Midrange(Defeat, 750Hz, 1.5kHz, 3kHz): ±5dB (1.5kHz), a
Treble(Defeat, 6kHz, 3.5kHz, 2kHz): ±15dB (20kHz), a 3dB step
|A low filter
||25Hz, 50Hz:-3dB (12 dB/oct)
|A high filter
||12kHz, 6kHz:-3dB (12 dB/oct)
|The semiconductor used
||205W (a maximum of 550 VA)
||Width 500x height 140x depth of 347mm