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LUXMAN - C-800f Preamplifier


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Item: ALUXC800F
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Save More than $9,000 on One of the Finest Japan-Made Preamplifiers Ever Engineered: Luxman C-800f Delivers Utter Purity Via Single-Balanced Design, LECUA Volume Control, Custom Parts

Using trickle down technology from the award-winning C-1000f control amplifier, the fully balanced Luxman C-800f preamplifier spoils listeners with incredible purity and jam-packed connectivity. Single-ended and three balanced inputs. Two single-ended and two balanced outputs. A phase switch on the front panel. And perhaps most importantly, the LECUA 1000-WM volume control (Luxman Electric Controlled Ultimate Attenuator with Weighting Matrix Technology) and electronic input selector. Luxman's most advanced ODNF circuit is also here and delivers state-of-the art musical performance.

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. The LECUA 1000WM circuit converts the music signal from a voltage into a current, switches gain by means of switching on the attenuates, and then reconverts the current into a voltage. The entire process is carried out in the analog domain. 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.

The 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. Unlike 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. Because LECUA 1000WM is an electronic circuit employing fixed-value resistors, there is virtually no left/right tracking error at low volume levels. Since channels can be kept separate, crosstalk does not present a problem.

Four onboard channels of amplification/attenuation provide immense flexibility. One can choose between two individual pairs of single-ended outputs, which can then be set to different output levels, such as in a bi-amplified system or use all four channels for the fully differentially balanced outputs.

C-800f utilizes 100 millimicron thick gold-plated peel coat PCB which reduces resistance to a minimum in all audio circuits. The delicate music of the low-level signal is protected from unnecessary vibration and degradation, by the installation of cast-iron pillars for supporting the chassis. C-800f also has a robust amplifier section capable of driving any amplifier and uses 6,600μF of capacitance. Up to 11 volts are available per channel in balanced mode. The balance between the right and left channels can be adjusted from the remote control. In single-ended mode, two pairs of outputs are available, which can be adjusted individually from each other. For example, a 6dB difference between both outputs can be set to allow for the different gain structure of two different amplifiers in a bi-amping situation.

Custom parts, such as resistors and condensers are used extensively throughout. Kappa alloy RCA sockets are used because of their high conductance and low resistance. The fluorescent display shows the different modes as well as source selection and the volume setting, is crisp and easy to read. It may also be dimmed from the remote control. RJ11 connectors are used for the remote 12V DC trigger to power up or down the attached amplifiers.

In order for an amplifier to multiply the signal cleanly, it first needs to receive clean electrical power. Luxman views the AC input with great concern. Just as serious listening tests are applied to the power cables, so too is the AC inlet built to rigorous standards. With the C-800f, the AC inlet starts with high-purity brass which subsequently receives a non-magnetic nickel plating. Finally, gold-plating is administered in order to maintain a low resistance.

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Input sensitivity/Input impedance:
Output/Output impedance:
   unbalance/rating 1V/564Ω Maximum 5.5V
   balance/rating 1V/1128Ω Maximum 11V
Total harmonic distortion rate:
   unbalance/0.009% (20Hz-20kHz)
   balance/0.005% (20Hz-20kHz)
Frequency response:
   5Hz-20kHz (+0, -0.1dB)
   1Hz-117kHz (+0, -3.0dB)
S/N ratio:
   unbalance/123dB (IHF-A)
   balance/126dB (IHF-A)
Power consumption:
24W (Electrical Appliance and Material Safety Law)
2.3W (at standby)
Dimensions (WHD): 17.3" x 4.6" x 16.8"
Weight: 38.8 lbs.

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