make comparisons as easy as possible only two amps were compared
at a time. Comparing more than one pair of amps at a time would
have been more difficult.
amps were powered up and warmed up. Both used identical power
cords too. The amp in stand-by had shorting plugs in the RCA's
were identified to the group by the use of a single letter. Two
letters were given to the group representing the two amps that
would be compared and they were all told which amps (which letter)
were up. They didn't realize it but the letters used were the
last letter in the name of the amp or company name. This meant
that in the end there was no confusion as to which amp was which
utilized a segmented listening method where we would play one
minute or so of one song and play it two and sometimes three times
through then switch amps and repeat. This gave each person a good
recollection of how that piece of music sounded with that amp.
After that track we would then leave that amp up and let it be
the first to play a new music segment then switch back to the
would continue this until there was a clear majority that favored
only one amp or until there was a clear census that it was too
close to call. We had both incidences where differences were clear,
immediate, and definitive with a clear favorite. And yes, some
differences were noticed between amps immediately. Other comparisons
were close, took more time and yielded no favorite.
is a copy of the score card used:
top section was used for one amp the lower section for the other
things to listen for and ways to grade them were tools used to
help distinguish differences and draw some conclusions.
real telling lines were the comments section where listeners made
notes of things that stood out.
there were the two lines in the middle. These two lines were key.
first line asked for the amp that was favored. They then had to
circle a key work to the right to allow us to know how much it
second line allowed listeners to grade the differences between
the two amps.
about three different songs had been gone through there was already
a majority consensus most of the time. Some times there was no
sense in continuing. Everyone was done, and there was a clear
music selections were played for each group of amps to avoid getting
tired of hearing the same music all day. One reference (one song)
was used though on each amp. It was a very telling selection.
It was the first track on the Jessie Cook, Gravity CD. Other artist
used included Patty Larkin, Alison Krauss, Katie Melua, Vienna
Teng, Lyle Lovett, tracks from the Burmester 3 CD, and I think
I am forgetting some.
Park, TX 76367