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In the Forum: Horn-Loaded Speakers
In the Thread: The Kato-san's Goto system
Post Subject: The Kato-san's Goto systemPosted by Romy the Cat on: 5/23/2017
It is not secret that Stefano Bertoncello loves to appreciate
Goto and is very prolific Goto devotee. Some people love to be groupies of some
cars manufactures, or football teams or political parties. I never associated with any “group identity” and
even the tuition for me to be align with any groups make my independent spirit
to hurt. Stefano published at his blog an article about a beloved by him Japanese
Goto system that I find worth to observe:
http://twogoodears.blogspot.com/2017/05/1.html
I am perfectly OK with Stefano
love what he loves and his admiration of the installation is not the subject of
my criticism. Would Stefano be a “professional reviewer” then I would use harsh
language to describe his comment but as a private person writing at his own
blog he is perfectly fine to express whatever he wish a I personally do grad
that he liked the sound from the playback.
However, as I person who is trying to advocate some kind of
hors design maturity I feel that I need to make some comments. You, see the a maturity
is an opposition to immaturity and an immaturity, according to Immanuel Kant’s “What
is Enlightenment”, is a refusal to use reasoning. So, I would like to observe
some reasoning in the Mr. Kato Goto installation.
Again, I have advocated this subject many times: reasoning needs
to be proportional to spent efforts. If one is listening a table radio of a single
2-way stereo-box then it indicates a non-pretensions approach and there is absolutely
no reason to demand anything from the owner of the playback. If a person however
spent years of own life and many hundreds thousand dollars to build an elaborate
public installation then it is a very different matter. No one want to be judgmental
about the personal motives but we are perfectly might to learn about objectives,
means, results and the reasoning of what
was accomplished. So, what Mr. Kato expressed in his Goto installation?
I do not see anything but the unfortunately-common for the Goto
owners as groupies immaturity.
Mr. Kato stack up a whole bunch of horn in big random pile,
screw a accidental Goto drivers that much by frequency range, connected everything
with branded crossover and he feel that it is some kind of presumption of Goto reasoning.
Let to leave the time alignment problem outside of the attention, there is nothing
to talk about it. I am sure Stefano would not drive his car with valves not synchronized
by timing belt or at least would not claim that it was the best ride of his
life :-), the most interesting was the diagram how the system is organized.
The Mr. Kato multiple sources run into Goto EPH-2002 preamp.
Then it goes into active crossover EPH-4002. This is ACTIVE devise that shall
have two buffers for input and for output. The input has to be buffered as the
filter shall ride decupled from preamp output and the output shall be buffered
as the crossover need to see a stable impedance and to drive multiple amps and
cables. The insult the injuries is that EPH-4002 has an ugly RC filtration. Again,
all of it would be fine for $500 table radio, or for $50K Las Vegas high fir
showroom or for $250K playback of another “industry reviewer” but for more of
les self-respected individual who use high-end audio reasoning I would ask questions.
1)
With your wonderful Goto drivers do you hear the
ugly consequence of RC filtration?
2)
Why do you need to use superfluous and redundant 2 extra active stages in your crossover if you
implement multisampling, have stable permanents load and the crossover might be
very effectively be done no passive filtration against amplifier, particularly since
you use a DC preamp and output impedance of your preamp is not a factor.
3)
You use an additional 6kHz filter for upper channels
at the EPH-3002’s input, Why now to put there second order phase-minimal filter
in order do not pass the signal across the channel dividing buffers of the EPH-2002?
4)
Where are high-pass filters that unload the bass
from bass drivers?
So, in my view, if to remove from the picture that fact that
Kato-san uses expensive drivers and generally positively use multi-amplification
(in his case he used are SS amplification and there is no need to be bothered with
DSET concept), the rest of his audio decisions make him no different than a
typical DIY-audio-centric Iowa hoodlum dumps in his garage a random PA horns
and pitches it as a newer invention of Amsterdam Jew (Plagiarism from Marques)..
Rgs,
Romy the Cat
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