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Without listening to sound you
will listen to music Audio-tekne's
"Tone Quality Improvement technique"
6.Other
methods of improvement.
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The products of our company are introduced to Italy by greatest
evaluation of the audio magazine " Fedelta del suono". Audio
Tekne incorporated Representative Kiyoaki
Imai(imai@audiotekne.com) |
- A transformer, speaker system etc that applied magnetism is receiving the
influence of the terrestrial magnetism. Please combine the magnetism direction
of the devices in the
direction of the terrestrial magnetism as long as it
is possible.
In the case of the transformer with unknown magnetic direction,
please move it slowly, and look for S / N ratio, and distortion decrease.
A speaker unit, a network coil, MC transformer, CD line transformer, a power supply
transformer, all have an optimal orientation out which an effect surely comes.
- Please shield a coaxial cable type signal code further (only the exit of a
signal connect the earth). The signal in which current into earth is shielded
from external induction, S / N ratio is improved, and distortion decreases.
- If a matching transformer (32ohm: 4, 8ohm) is connected between a transistor
amplifier and speaker system, the tone quality can be improved.
The matching
transformer is the big core volume and winding with enough inductance is able
to cope with the low frequency of 10 Hz.
The transformer that does not satisfy
this condition will do a lot for the sound to become bad.
- Usually,
transistor amplifier measured characteristics are improved (frequency response,
distortion) with a lot of NFB.
However, the amplifier that improved the characteristics
with NFB becomes of a strong unnatural sound personality.
The vacuum tube
amplifier characteristics are also improved NFB. Moreover, the vacuum tube amplifier
characteristics can also be improved by connecting a resister in parallel with
a transformer and thus rectify impedance compulsorily. Such amplifier becomes
of the same sound as transistor amplifier.
The
condition for the good amplifier is to not use NFB. Furthermore, when a natural
sound is demanded, it is to choose the vacuum tube amplifier of transformer connection
circuit, not C-R connection circuit or SRPP circuit.
Attention). As for a good vacuum tube amplifier the transformer and push-pull
circuit are life.
- How to demagnetize an amplifier.
Each part of the amplifier is magnetized little by
little while we are using it. First, please remove connections of a speaker system.
Please put the volume of the amplifier onto minimum and connect a pink noise or
a white noise (noise between broadcasting stations of FM tuner) into a phono terminal.
And please raise volume slowly and lower it slowly.
The sound becomes of a
low distortion.
Attention.
Please take great care
about breakage with transistor amplifier.
The effect
is big in the vacuum tube amplifier, especially have a great effect in a single
ended type amplifier. It is good to take magnetism out every one to three months. | |
