|SANSUI AU-alpha 907L Extra
|250,000yen(around the 1989 time)
The top Integrated Amplifier of the LExtra series
which adopted LAPT of the transistor only for an audio.
In order to
improve the linearity in Loule Bell, LAPT (Linear Amplification Power
Transistor) newly developed only for the audio is carried.
LAPT has adopted
pure-copper material, it put into practice to the bonding wire, and the
occurrence of a magnetic distortion is eliminated by becoming nonmagnetic, and
while improving sharply and wide-band-izing cut-off frequency by this, the
linearity and switching characteristic of a current amplification factor are also improving.
-X balance circuitry is adopted as circuitry.
Furthermore, the outstanding high region property is acquired by the NEW diamond
differential circuit which made FET of the first rank cascade connection.
The power-source part was placed in the center and the twin monophonic
construction which dissociated symmetrically and has arranged the power
amplifier part mounted on the large-sized heat sinker is adopted. This cut off
the interference of the source of an oscillation which has an ill effect on a
tone quality, and the outstanding image orientation is gained.
In AU-alpha 907L Extra, since no vibrating and an absent resonance are
put more into practice, pure-copper parts, such as a large-sized insulator
of a pure-copper Naked, a LAPT absorber, the transformer base, have been
power-source part has a balance power-source structure, and is stopping various
ill effects by considering it as the closed loop which became independent of a
Moreover, the large-sized transformer of the new development
which enclosed the high-density fill, a power source capacitor, first recovery
diode, etc. adopted the newly developed custom-made thing, and
low-impedance-izing and high speed-ization are realized.
selected carefully until music signals, such as a capacitor, a resistor, a
semiconductor, and a coil, resulted in each of parts centering on the part
passed directly is adopted.
The phone equalizer of a full-scale discrete
stream composition is carried in the equalizer part.
The balance input
Functionalities, such as a power amplifier direct, a Source
Direct, and an REC serector, are carried.
The 6-unit Detent volume is
carried in the volume.
||Alpha-X balanced, NM-LAPT, and amplifier
|<Power amplifier part>
|Effective output (20Hz - 20kHz)
Both channel drive
|THD (at the time of an effective output)
||0.003% or less (8ohm)
|Cross modulation distortion
||0.003% or less (8ohm)
|Frequency characteristic (1W)
||1V / 3kohm (1kHz)
|SN ratio (A network)
||120dB or more
|TIM distortion (SAWTOOTH)
||Below a limit-of-measurement value
|Phono man month: 2.5mV / 47kohm
MC: 300 microvolts/100 ohms
compact disk, Tuner, Line, Tape/DAT1, 2 or
3:150mV / 20kohm
|Phono maximum permissible input
||Phono man month: 20Hz-20kHz}0.2dB
compact disk, Tuner, Line, Tape/DAT1, 2, and 3:DC-300kHz+0 -3 dB
||Phono man month: 90dB or more
75dB or more
compact disk, Tuner, Line, Tape/DAT1, 2 or 3:110dB or more
||Bass: }5dB (50Hz)
Treble: }5dB (15kHz)
||16Hz (-3dB), 6dB / oct
||+ 4dB (50Hz), +3dB (10kHz)
||Width 472x height 164x depth of 450mm