My
Audio Phylosophy
1. Simplicity
2. Linearity
3. Pure Class A
4. Zero Feedbak Design
5. Over Capacity and Ultra regulated power
supply
Filosofi No.1
Simplicity
Every kind of audio component
no matter how popular the brand , how
expensive the price ,
how close the tolerance, will contribute some quality
degadration into the
music signal. For this reason I will always take out every
unnecessary audio component
from the audio signal path in my design but
without neglecting the
quality target of the design.
Albert Einstein ever
said his opinion that is relate to this phylosophy
"Everything must be simple
but not simpler".
Filosofi No. 2
Linearity
Usually audio amplifiers
are linear amplifier that's why linerarity is
something important
to achieve as one goal of audio circuit design.
To achieve linearity
of audio circuit design by using tube is not difficult,
because naturally tubes
are more linear compare to other active electronic
devices such as junction
transistor, FET, IC linear OP Amp, etc.
Filosofi No. 3
Pure
Class A
Now day there are many
class of operation in amplifier design, but A, B,
AB and C class
are the roots of those improvement. I my self only accept A
class operation in my
design because the sound quality offered by A class is
unbeatenable. A class
operation offered us natural sound, clear & warm,
precise
depth that other class of operation can not.
"A" class operation require
high bias current, later when you see My design
you'll find
that I adjust high value of bias current.
Filosofi No. 4
Zero
Feedback Design
What I mean here is Negative
Feed back or in short called as NFB.
NFB is taking out some portion
of the output signal, invert it, and finally mix it
with the input signal. Technically
NFB is the good idea to achieve good
specification perfomance such
as low distortion, wide bandwith, low output
impedance etc. But all the
advantages offered by NFB are not always satisfying
human ear and feeling,
because human ear can not hear 100kHz sound frequency
it can only hear the frequency
bellow 20kHz, and human ear also can't
distinguish 0.1 % diferent
of distortion.
Usually NFB design are lack
of dynamic while dynamic is one of the important
thing that build music. Human
feeling can detect dynamic character of the
music, that the lack
of dynamic will cause mising one important thing when enjoy
the music. To prevent mising
of dynamic property I decide not to use NFB in my
design.
Filosofi No. 5
Over
Capacity and Ultra Regulated Power Supply
Just imagine what's going on after you eat
dirty food, your health will drop down and your working capability will
get worse. In the same way we can also imagine what's going on when noisy,
unstable and high impedance supply feeded into our amplifier design. It
will miss its staging, dynamic, focus, etc. In the simple word I want to
tell you that power supply is very important part of the audio design.
Based on that point of view I always provide
over capacity and ultra regulated power supply for my desgin.
Over capacity indicated by using big amount
electolytic capacitor paraleled by high quality oil or film capacitor on
the front end of my power supply design, and ultra regulated indicated
by using multi stage regulator and filter circuits.