Power 15n &
Simon Yorke S7
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This is my second
coming to my friend Mr. AN, My first coming was done 14 years ago,
on September 9th, 2005, when I conducted trial of
my first generation Power15 Turntable power supply on his Linn
Valhalla and Basis TT.
Description of my first coming to Mr. AN's house can be seen
in this URL http://www.sap.or.id/Basis_Valhalla.html
This time I come to Mr. AN'house to test my Power15n Turmtable
motor supply to his Simon Yorke S7 Turntable
Mr, AN's system configuration are as follows
: Simon Yorke S7 with Lyra Atlas MC Catridge
: Mc Intosh C1000
: Mc Intosh 1.25kW
: Avalon Isis
Date of Trial
: 22 Juni 2019, sekitar
Simon Yorke S7 with Lyra Atlas MC
The reason why Mr. AN invited me to demonstrate my Power 15n turntable
motor supply is because his Simon Yorke S7 has problem with its speed
stability and accuracy. Simon Yorke S7 uses AC motor which speed accuracy
is totally depend on AC supply feeded into it. As I ever investigated
in Indonesia, electric supply frequency constantly swing from around
49.5Hz up to 50.5 Hz, so no wonder any TT with AC motor can not
turn precisely when connected direcly to wall electric supply.
Power 15n can produce very low distortion and accurate frequency electric
supply for TT with AC motor, to ensure TT can turn smootly at very precise
Mr. AN is a fan
of heavy metal music, so in this trial most of the vinyl used
was from the heavy metal genre, unfortunately I didn't have the chance to
photograph the cover of the vinyl.
The thing that I got from this trial, that also opened my
horizons in enjoying music is that testing high end audio equipment can
also be done with heavy metal music.
Usually when I come to my client's houses, they always play jazz
music from audiophille grade recording to test my product that I present.
But this time I get a very different experience, testing high end
audio equipment using heavy metal music. This experience make me realize
that to play heavy metal music with high quality level of performance require
proper skill like playing clasicall or jazz music.
To my personal listening taste all the metal music
used by Mr. AN was played at very fast tempo/timing featuring many shifting
in note. What made me rather headache was that Mr. AN turn the volume up
to around 100dB SPL.
According to Mr. AN he used this kind of music in order
to push audio system's capability until its maximum limit.
As usual at first step of trial we ran Simon Yorke S7 TT feeded by
electricity direct from wall, we listen and remember all the sound character
produce by audio system carefully. After that we listened
back all the same song with same level to compare the result after using
Acording to Mr. AN, after connect Power15n to S7 TT, sound depth
become deeper and stereo image become wider and stable. He also noticed that
vocal sound did not mix around and sink down into music instrument sound,
but vocal sound precisely separate from music instrument sound.
During this trial I also got the opportunity to Demag one of my favourite
album during my junior high school time, namely Thriller of Michael Jackson
Demag Thriller Michael Jackson's
Mc Intosh C1000 Preamp
McIntosh MC1.25kW Power Amp
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