Luxman C 70 Brochure

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e exploration into the deep fields The position grabbing the key of the sound quality of control amplifier is the sound volume adjusting mechanism, namely the attenuator. In C-70f, the newly-developed high sound quality attenuator LECUA (LUXMAN Electric Controlled Ultimate Attenuator) which has positioned the super-higher fixed resistance switching type attenuator built in the Luxmans flagship control amplifier C-10 at a very high level was installed. LECUA is the attenuator which places the 48-position sound quality at the most prioritized position by carrying out the attenuation by just the normal 2-base fixed resistors. By supplying the mechanism which could activate the FET switch in non-contact mode with high-performance photo interrupter, the outstanding reliability without noise could be obtained. The LECUA initially built in the C-70f is composed of the independent 4 circuits that are equipped with hot side/cold side for transferring the stereo balance. It is a kind of large-scale electronic attenuator with totally 16 circuit boards and about 2,000 pieces of components. But the biggest feature of the most important signal pass lies in that it is composed of very simple circuits containing 2-base fixed resistors carefully manufactured for improving the sound quality. The 48 positions in total are the set up positions maintained for actual sound volume, and could offer an firm operation by click ·touch with a light and joyful heart. A convenient unit·gain [gain-1] position was prepared for the introduction of home theatre processor. With the development of LECUA which could gain an overwhelming resolution and quietness even at the tiny level isolated from the left and right level errors, Luxmans control amplifier has reached a new peak.

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The technical innovation aims at improving the reproduction of music The negative feed back (NF) circuit is not only one of the absolutely necessary parts for improving the features of the amplification, but also could exert impact on the sound quality as a whole. Here, the most important thing is nothing but the dynamic status of music reproduction, and the special attentions should be paid to the acquisition of neutral sound color, the rising of sound and the overall speed feeling, braking force, etc. The ODNF (Only Distortion Negative Feedback) circuit independently developed by Luxman is quite different from the existing method which feeds the output signal (music signal) back to the amplification circuit with only the differential signal which is the distorted element arising from the special circuit comparing and picking out the input waveform and output waveform, and was fed back to the amplification circuit as a distorted element to cancel it. Thus the DC servo amplifier controlling the phase perfection circuit and super-lower band could be omitted, and the sound in super-higher band could be realized by keeping the natural sound color as it was with the high slewing rate. Through the operation of repeating the trial listening and of improving the sophistication, the ODNF circuit has been evolving into Version 2. The natural sound quality and the drive feeling in the direction of lower band of M-70f will supply you with the lifelike reality of the passion poured into the music by the players while fully displaying the charm of integrated speaker system.