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

Features of This Unit

New LECUA1000 — LUXMAN Electronically
Controlled Attenuator 1000 —
New LECUA1000, which is the integration of an amplifier
circuit and a high-precision attenuator by electronically-con-
trolled fixed resistance switcheovers is mounted. Further fine
sound volume adjustable without deterioration of sound qual-
ity from 0 dB through −87 dB
ODNF — Only Distortion Negative
Feedback —
The output section features LUXMAN's original distortion-on-
ly negative feedback system which allows for a high speed
primary slew rate and ultra-wide audio bandwidth. Only dis-
tortion generated in the amplification process is fed back
for cancellation. This maintains pure, high quality sound re-
production in the main amplifier section. The latest version,
ODNF 4.0 has achieved low impedance and a high signal to
noise ratio for the transmission circuits thanks to the paral-
leled first stage and Darlington equipped second stage am-
plification circuits. Also the input stage error detection circuits
are triple-paralleled to moderate frequency characteristics
and noise.
4 parallel push-pull output stages
4 parallel push-pull structure of bipolar transistors.
Rated output of 120 W+120 W (8Ω), 220 W+220 W (4Ω)
Peel coat, PCB
A peel coat PCB is used for the amplifier board to eliminate
the dielectric effect of a resist by using gold plating instead of
applying a resist on copper foil with 100μm in thickness.
Highly stable power supply
Highly stable power supply circuit that combines a large-ca-
pacity EI-core-type power transformer with customizable
10,000μF × 8 capacitor blocks.
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Parallel speaker relays
This unit is equipped with 2 large parallel speaker relays with
a low resistance value to reduce the impedance of the speak-
er 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
Selector switch IC of high sound quality, which is used in the
top-end control amplifier, C-900u, improves the separation
and crosstalk performances.
Schottky barrier diodes
By using Schottky barrier diodes, manufactured by Nihon
Inter Electronics Corporation, this unit achieves higher DC
conversion efficiency in the rectifier circuit and much less
switching noise.
Original LUXMAN's OFC wiring
Our original un-plated OFC wiring with spirally wrapped shield-
ing is used for all internal connections to ensure smooth, pure
signal transmission. Especially 3.5 mm
between the amplifier board and speaker output board.
Non-angled circuitry
After careful consideration of the delicate nature of audio sig-
nal flow, non-angled circuit board tracking has been adopted
to achieve smooth signal transmission.
heavy wire is used
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