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Features of This Unit
Circuit configuration
Direct heated triode 300B non-feedback single stereo power
amplifier
Output tube
Highly reliable Japan-made TA-300B (manufactured by
Takatsuki Electric Industry Co., Ltd.) is used as a cathode
bias circuit. The constant voltage DC-ignition method is used
for the heaters.
Voltage amplification stage
Two-stage amplification circuit with highly reliable tubes
6SN7GTB (manufactured by Tung-Sol) in parallel connection.
Rectifying tube
Two pieces of indirectly heated tubes, 5AR4 (manufactured
by Sovtec) are used in the L and R independently, whose in-
ternal impedance is low and which have excellent regulation.
Due to a gradual rise in voltage supply to the output tubes,
their lives are expected to be prolonged.
2
Coupling capacitor
LUXMAN's original high sound quality oil capacitors are used.
Power transformer
The orient core EI type is used to pursue thickness and depth
in the bass range. Optimization of magnetic flux density im-
proves electrical characteristics and achieves higher sound
quality. The L-R independent structure of the secondary
winding, rectifying tubes, block capacitors, and choke coils
eliminates unwanted coloration of the sound and achieves
expressive capability with high tranquility.
Output transformer
Orient cut core carefully chosen for 300B tubes after a lot of
consideration to its sound quality and dimensional balance.
We have improved the directivity of wire rods and winding
structure and have achieved excellence in low frequency
characteristics using LUXMAN classic OY type as a basis.
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