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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.
