Audio Database

The

SANSUI AU-X11
275,000yen(around the 1982 time)

Description
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Master integrated DC amplifier which supplied technical [ that pursued the ideal configuration object of i integrated amplifier, and devoted in sound / all ], and was developed.

The super FF& diamond differential circuit is adopted as the power stage.
A super FF system is what combined NFB and feed forward, and cancels all distortion theoretically generated in the power stage. The structure of this system amplifies a distorted denial signal like a vermilion signal circuit with the error collection amplifier which forms the extraction and the feed-forward circuitry for the distorted component after the predrive stage by that distorted component detection action, and is compounding two signals with the output while it reduces distortion by NFB. Moreover, the summing point is coincided by adoption of the summing network which was exact and was stabilized.
The diamond differential circuit is having the structure which constructed the transistor in the form of the diamond exactly, is being able to take the large current margin of the drive stage infinitely, and has realized the high-speed responsibility of the drive stage.

Tone-quality investigation is carried out by adoption and the diamond differential circuit of the Dual FET of a low-noise high and gm being used for an equalizer-amplifier part.
Furthermore, DC servo stream composition is adopted.

DC amplifier stream composition of one-side-channel 14 stone FET and the power-source scheme push pull input/output only for right-and-left independent is used for MC head amplifier part.

The large-sized EI transformer is adopted as power amplification stages for large-sized toroidal-transformer and voltage amplification stages, and it has become a power-source part with the power stage, predrive stage, flat amplifier / equalizer, and MC head amplifier right-and-left full independence scheme 8 power-source stream composition.

Flux freelancers, such as a copper plating chassis, NM element, a wood bonnet, and a copper plating screw, are put into practice.


Rating of a mode
Form Master integrated DC amplifier
Effective output (10Hz - 20kHz) 160W+160W (8ohms)
THD (at the time of 10Hz - 20kHz, and an effective output) 0.004% or less (8ohms)
Output bandwidth (IHF, both channel operation) 5Hz - 100kHz (8ohms)
Frequency characteristic (1W) DC-300kHz+0 -3dB
SN ratio Phono MM:91dB
Phono MC:77dB
Tuner:110dB
Input sensitivity/impedance Phono MC high: 85 microvolts/30 ohms
Phono MC low: 270 microvolts/100 ohms
Maximum permissible input MM:330mV
MC:40mV
RIAA deflection (man month, rec out) 20Hz-20kHz}0.2dB
A high filter 16Hz (-3dB, 6 dB/oct)
Power dissipation (Electrical Appliance and Material Control Law) 400W
Dimensions Width 515x height 197x depth of 450mm
Weight 28.0kg