Audio Database

The

SANSUI AU-111
65,000yen(1965 release)

Description
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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 scheme.
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, respectively.

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 output.

Head amplifier has also adopted a new style silicon transistor (micro sep).

The first rank of middle amplifier has adopted the cathode follower circuitry where an input impedance is high and an Output load impedance is low.

Two kinds of tapes equalizers.

The low-impedance tape recording output-terminal by a cathode follower.

The low high filter of CR feedback scheme.

Loudness control.

Two kinds of center output-terminals of the ashes and the cut all the objects for bands, and for 3D system.

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.


Rating of a mode
Form Integrated Amplifier
Output power Music power (IHFM): 96W
Effective output: 45W/45W
Stereo effective output (both channel operation): 40W+40W
THD 0.8%
Cross modulation distortion (50Hz - 5.5kHz) 0.8%
Power Band Width (IHFM) 20Hz - 20kHz (at 0.8%)
Frequency characteristic AUX: 20Hz-50kHz}1dB
A hum and a noise (IHFM) AUX:-80dB
Phono:-70dB
Channel separation Phono:45dB
AUX:50dB
Remains noise 2mV (8ohm)
Load impedance 8ohm, 16ohm
Dumping factor 15
Input sensitivity/impedance (an effective output, 1kHz) 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 output) They are 100 times to Phono2 input.
They are 115 times to a Tape Head input.
Center channel output 1.5V / 48kohm (at the time of an effective output)
Equalizer property Phono1, 2:RIAA
Tape Head:NAB (19 cm/s, 9.5 cm/s)
Preamplifier output 2.1V/710 ohm (at the time of an effective output)
Tone control Low:Defeat, 250Hz, 500Hz
High:Defeat, 5kHz, 2.5kHz
Bass(50Hz) 250Hz o'clock: +11.5dB--10dB
500Hz o'clock: +16dB--14.5dB
Treble(10kHz) 5kHz o'clock: +12.5dB--11dB
2.5kHz o'clock: +7.5dB--6dB
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.
Thermionic tube (12 pieces) 6L6goal concept: Four pieces
7:5 12AX
12BH7A: Two pieces
8:1 6AQ
Transistor 2SC-402:2 piece
Diode (three pieces) SW-0.5a: One piece
SW-0.5d: Two pieces
Supply voltage AC100V/117V/240V, 50Hz/60Hz
Power consumption 280VA (maxima)
Dimensions Width 460x height 170(rubber ‹rœ‚­) x depth of 345mm
Weight 24.5kg