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Using trickle down technology from the award winning C-1000f control
amplifier. The C-900u is a fully balanced design. Three single-ended,
plus one dedicated external processor {Home Theater Bypass} and three
balanced inputs. Two single-ended and two balanced outputs. A fully
balanced design with tone controls is extremely difficult to implement
but the Luxman engineers have achieved this to allow music lovers to
enjoy all of their music collection. Luxman's latest compact version of
the LECUA 1000-WM volume control (LUXMAN Electric Controlled Ultimate
Attenuator with Weighting Matrix Technology). as well as the electronic
input selector. Luxman’s most advanced ODNF circuit is employed,
release 4.0. delivers state-of-the art musical performance. ■ Simple circuit configuration
LECUA
1000WM unifies the amplifier, volume control functions and power
supply in a three dimensional module, resulting in a circuit that is
electrically very simple. Long-term reliability is excellent, with
performance and sound quality that will remain unchanged also after
prolonged use. ■ LECUA 1000WM uses analog processingThe
LECUA 1000WM circuit converts the music signal from a voltage into a
current, switches gain by means of switching on the attentuaes, and then
reconverts the current into a voltage. The entire process is carried
out in the analog domain. ■ Same ergonomic feel as a conventional high-quality volume control
The
counter balanced volume control knob position is detected by a
dedicated CPU which in turn selects the current switches for LECUA
1000WM operation. Operating the knob therefore feels exactly the same as
with a conventional control, and operation via the remote control is
also possible. ■ Mute and Balance control are also implemented by LECUA 1000WMThe
functions of the attenuator and the left/right balance control are
covered by the LECUA 1000WM circuit as well, eliminating the need for
additional circuit stages. Keeping the configuration simple helps to
maintain high performance and sonic purity. LECUA
1000WM is a radically different volume control principle that
eliminates all variable resistors from the signal path and provides
top-notch performance and sound quality. Because the music signal is not
affected by changes in impedance, high signal-to-noise ratio and low
distortion are maintained at any volume control setting. ■LECUA 1000WM ensures high S/N ratio and uniform frequency responseUnlike
conventional volume controls, LECUA 1000WM does not introduce a change
in impedance at any volume setting. Consequently, there is no
deterioration of S/N ratio and frequency response remains totally
uniform. The benefits are especially apparent at settings that
correspond to normal listening levels, because the sound remains
perfectly transparent and the tonal quality is not altered in any way. ■ No more left/right tracking differences or crosstalk
Because
LECUA 1000WM is an electronic circuit employing fixed-value resistors,
there is virtually no left/right tracking error also at low volume
levels. Since channels can be kept separate, crosstalk also does not
present a problem
Volume Control The
integrated amplifiers also benefit from the C1000f in that they use a
variation of the LECUA 1000 volume control. At any single volume
setting only a few resistors are in circuit per channel. The less
devices in the signal path, the purer the sound, the cleaner the
music. At low listening levels, potentiometers
have trouble keeping both channels in balance, so one channel might
easily be 3dB louder than the other. With the volume control made of
discrete parts, this is no longer an issue. ODNF Luxman
holds many patents for audio engineering, amongst them is the
application of Global Negative Feedback to the output stage, which while
widely used throughout the audio industry, they no longer use
themselves. Luxman nowadays use a
distortion reduction circuit called Only Distortion Negative Feedback
(ODNF). This system works by isolating noise & distortion at the
output from the music signal and sparingly applying negative feedback to
suppress them. Conventional negative feedback systems can have an
adverse effect on the music, introducing phase distortion. "The circuit
features such an ultra-wide range, ultra- high slew rate and ultra low
distortion that it does not use phase compensation for the music
signal amplifying circuits." This new technology also ensures that
need for a DC servo circuit is alleviated, again improving sound
quality.
Tone Controls The
tone controls might seem like an anachronism in this day and age of
minimalism, but they can be remarkably effective in bring to life
a less than perfect music collection. We all have music gems in our
collection that are sonicly challenging. A lot of the 1980's CDs are
quite harsh sounding and the digital glare can be quite fatiguing.
Reduce the treble slightly and while the harsh CD is not going to
suddenly sound like a reference recording, at least it will now be
perfectly listenable. Sit back relax, enjoy the music & forgot
about the HiFi. When you want to bypass the tone controls, just engage
the Line Straight switch, either from the remote control or from the
front panel.
A feature new to Luxman's preamp is the "Pre In" or a Home Theater Bypass for connection to an external Processor. SPECIFICATIONS| Inputs | Unbalanced 3 systems, balanced 3 systems | | Outputs | Unbalanced 2 systems, balanced 2 systems | | Input Sensitivity/Impedance | unbalanced 255mV / 43kΩ, balanced 255mV / 86kΩ | | Output Voltage / Impedance | unbalanced rated 1v/90Ω Maximum 11V
balance rated 1V/180V Maximum 22.5v | | Harmonic Distortion | 0.009% (20Hz - 20kHz), balanced 0.005% (20Hz-20kHz) | | Frequency Response | 20Hz - 20kHz (+0, -0.1dB), 5Hz - 120kHz (+0, -3.0dB) | | Signal-to-noise ratio | Unbalanced 123dB, balanced 126dB | | Power Consumption | 42W, 2.2 (at standby) | | Dimensions (W x H x D) | 440 x 130 x 430mm | | Weight | 19.7kg |
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