Features Of This Unit - Luxman L-509Z Owner's Manual

Features of This Unit

LECUA-EX — Luxman Electronically
Controlled Ultimate Attenuator-Excellent
eXperience —
Our unique sound volume adjustment mechanism LECUA,
that is the integration of a high precision attenuator and
an amplifier circuitry, is now integrated with a heavy rota-
tion mechanism which offers excellent control feeling and
employed here as LECUA-EX.
Electrically controlled fixed resistance switching enables fine
sound volume adjustments from 0 dB through –87 dB with no
deterioration in sound quality over the full range of the volume
control.
LIFES — Luxman Integrated Feedback
Engine System —
ODNF, LUXMAN's original amplification feedback circuitry,
has been renewed, and LIFES, our newly developed feed-
back engine, is incorporated right at the heart of this amplifier,
developing a richer sound quality.
Adopting a dual FET into the input section of the sub amplifier,
which detects any distortion in the audio signal, and dual tran-
sistors in the cascade circuit and current mirror circuit, sound
quality has been improved throughout the amplification circuit
with a transparent sound quality comparable a non-feedback
equipped amplifier and excellent high frequency character-
istics.
This unit has LIFES of full-discrete configuration on both the
pre-amplifier section and the power-amplifier section respec-
tively.
Quadruple-paralleled push-pull output
stages
Quadruple-paralleled bipolar transistors in push-pull configu-
ration are used.
Rated output of 120 W+120 W (8 Ω), 220 W+220 W (4 Ω)
Highly stable power supply
The unit's highly stable power supply circuitry features a
large capacity EI-core-type power transformer with 8 custom
designed 10,000 μF blocking capacitors.
Peel coat, PCB
Peel coat PCB, where gold plating is applied on 100 μm thick
copper foil instead of applying resist, is used for the amplifier
circuit board so that dielectric effect on resist is eliminated.
2
Parallel speaker relays
This unit is equipped with 2 large parallel speaker relays with a
low resistance value to reduce the impedance of the speaker
output lines.
Beeline construction
LUXMAN's Beeline construction ensures that the audio signal
path takes the optimum shortest route from input to speaker
output.
Selector switch IC
The selector switch IC, as used in our high-end C-900u con-
trol amplifier, supports high quality audio and improves input
separation and crosstalk performance.
Schottky barrier diodes
By using Schottky diodes, manufactured by KYOCERA
Corporation, this unit achieves very high DC conversion
efficiency in the power rectifier circuitry and much less
switching noise.
LUXMAN's original OFC wiring
Our original OFC cable, with non-plated core wire, is used for
internal wiring to achieve smooth signal transmission.
Non-angled circuitry
After carefully considering the delicate nature of the audio sig-
nal flow, non-angled circuit board tracking has been adopted
to achieve smooth signal transmission.