Luxman L-590AXII, Owner'S Manual

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Features of This Unit
New LECUA1000 — LUXMAN Electric
Controlled Ultimate Attenuator 1000
New LECUA1000, which is the integration of an amplifier cir-
cuit and a high-precision attenuator by electrically-controlled
fixed resistance switcheovers is mounted.
Further fine sound volume adjustable without deterioration of
sound quality from 0 dB through –87 dB
More sensitive volume adjustment from 0 dB through –87 dB
without deterioration of sound quality is possible.
ODNF — Only Distortion Negative
Feedback —
The amplification feedback circuit that has acquired the high-
speed primary slew rate and ultra-wide bandwidth by feeding
back only distortion generated during amplification to main-
tain the pure sound quality of the main-amplifier that is almost
non-feedback.
The newest version, 4.0, has achieved the low impedance
and high S/N ratio of the transmission circuit thanks to 4-par-
allelized first stage and Darlington-connected second stage
of the amplification circuit.
In addition, the input stage of the error detection circuit is
parallelized into 3 stages to moderate the distortion charac-
teristic and noise.
3 parallel push-pull output stages
3 parallel push-pull structure of the bipolar transistors.
Pure class A rated output 30 W+30 W (8 Ω).
High-inertia power supply
L and R separated high-inertia power supply circuit that com-
bines a large-capacity EI-core-type power transformer with
original 10,000 μF × 8 block capacitors.
Parallel speaker relays
This unit is equipped with large speaker relays in 2 parallel
structure with a low resistance value to reduce the imped-
ance of the speaker output lines.
Beeline construction
Newly designed beeline construction makes the audio input
signal to be conveyed via the optimum and shortest route to
the speaker output.
Selector switch IC
Selector switch IC of high sound quality, which is used in
the control amplifier, C-900u, to improve the separation and
crosstalk performances
Schottky barrier diode
Application of schottky barrier diode manufactured by Nihon
Inter Electronics Corporation that has less switching noises
and higher conversion efficiency to the DC voltage for the
power supply rectifier circuit.
LUXMAN’s original OFC wires
Our original OFC wires are used in the internal wiring to
achieve smooth signal transmission thanks to the spiral wrap
shielding on each core and the non-plating process on the
core wire.
Round pattern board
After careful consideration of delicate audio signal flow, a
round pattern board is used to achieve smooth electric cur-
rent transmission.