5
OUTPUT LEVEL
The CSP2 is designed with an adjustable line
output level that will set the voltage for both
the stereo and mono output jacks. There are
two thumb pots located just off the rear corners
of the power transformer that are used to ad-
just the output level for each channel indepen-
dently.
These pots have been pre-adjusted at the fac-
tory and marked so that you can easily restore
your CSP2 to the factory calibration.
Factory calibration of the output level is set to
4.00 Volts at 1000 Hz with a 2.00 Volt input sig-
nal and the volume control wide open. With a
2.00 Volt input signal (the standard for CD play-
ers) it is possible to adjust the CSP2 output
level to 35 volts with no visible distortion.
The output level adjustments do not effect the
headphone jack.
TUBE LAYOUT - INSTALLATION
The CSP2 uses a single 6N1P (which is a dual
triode) to drive both the left and right channels.
This tube is located at the front just behind the
volume control. Changing this tube will change
the sound of both channels. Because of this, it
is arguably the most popular tube to roll if you
enjoy hearing how one brand of tube sounds
different from the next.
The two other 6N1P’s which are being driven by
the front input tube, are wired one tube for
each channel. The left tube for the left channel,
right tube for the right channel. These can also
be rolled with different brands and have an
equal effect on how your CSP2 sounds. Just re-
member that whatever you do on the left side,
you should also do on the right - meaning the
tubes should be of the same type and brand.
Note: Due to the differences in hearing be-
tween the average humans left and right
ears and the non-symmetry of most listening
spaces, some enlightened audiophiles will ac-
tually use different brand or type tubes from
channel to channel to achieve a better bal-
ance for their own ears and room.
TUBE LIFE
Input tube life is rated at either 3000 or 5000
hours depending on the type tube used.
Rectifier tubes can easily last the life of the
amplifier.
Input tube life will vary from brand to brand
and should be checked yearly.
The easiest way to check a tube is to replace
it with a known good one. and compare both
sound quality and noise level of the amplifier.
If you hear very little difference, the tubes
are still good.
The most common trait of a tired tube or
tube that is going bad is background noise
and or a loss of clarity or pre-mature distor-
tion.
Again, the easiest way to check a tube is to
replace it with a known good one. and com-
pare both sound quality and noise level of
the amplifier. If you hear very little differ-
ence, the tubes are still good.
