Decware CSP3 Operation Manual
OPERATION MANUAL MODEL : CSP3 - CLASSIC STEREO PREAMP! REV 1 MAR 2018
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Reference Vacuum Tube Preamplifier
CSP3
OPERATION MANUAL MODEL : CSP3 - CLASSIC STEREO PREAMP! REV 1 MAR 2018
IMPORTANT SAFETY
INSTRUCTIONS!
PLEASE READ THESE BEFORE
OPERATING THIS EQUIPMENT.
1. Read and Follow these instructions.
2. Do not plug your preamplifier in or
attempt to turn it on until you have
read and followed the steps in this
complete manual.
3. Never leave this preamplifier
powered ON while unattended or at
night when sleeping.
4. Do not use this preamplifier near
water or in damp locations.
5. Do not place this preamplifier near
any heat sources such as radiators,
heat registers, stoves, or directly
above other amplifiers that produce
heat.
6. Do not defeat the safety of the
three-prong power cord by
attempting to lift the ground. If
you only have two-prong outlets in
your home, have a licensed
electrician install a grounded outlet
near the preamplifier.
7. Protect the removable power cord
from being walked on or pinched at
either end.
8. Do not attempt to move this
preamplifier until after it has been
turned off and cooled down to
room temperature.
9. Unplug the preamplifier during
lightning storms or when unused
for long periods of time.
10. Refer all service to Decware or a
Decware authorized service tech.
Do not attempt to fix internal
problems. There are no user
serviceable parts inside.
11. WARNING HIGH VOLTAGES
PRESENT - This preamplifier stores
up to 500 volts in the capacitors.
Do not open the amplifier under
any conditions.
12. Never touch a vacuum tube while it
is operating. Some can reach
temperatures near 400 degrees F.
13. ALWAYS place preamplifier on a
solid sturdy clean and level surface
that can support its weight.!
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lightning flash with arrowhead, within
an equilateral triangle, is intended to
alert the user to the presence of uninstalled “dangerous voltage” within the
product’s enclosure that may be of risk
of electric shock to persons.
The exclamation point within an
equilateral triangle is intended to
alert the user to the presence of
important operating and maintenance (servicing) instructions in the
literature accompanying the appliance.
AVIS RISQUÉ DE CHOC ELECTRIC-NE PASOUVRIR.
WARNING- TO REDUCE RISK
OF FIRE OR ELECTRICAL
SHOCK, DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR
MOISTURE.
NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL.
To prevent the risk of electrical shock, do not remove
cover or bottom. No user serviceable parts inside.
OPERATION MANUAL MODEL : CSP3 - CLASSIC STEREO PREAMP! REV 1 MAR 2018
Thank You!
_______________________________
By purchasing this preamplifier you are
helping to preserve the art of finely
crafted audio products with absolute
world class reference fidelity.
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Please Take a Moment!
_______________________________
The serial number and date of your
amplifier are recorded on the bottom.
Take a moment to write them down
here so you don’t have to move your
amplifier once it is installed.
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Serial Number:__________________
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Date (Month/Year): ______________
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Model Number: _________________
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Technical Assistance
_______________________________
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You can get help by calling us directly
or you by e-mail.
If you have any issues, check the web
site’s contact page for up to date e-mail
addresses and phone hours.
We also have a strong online support
forum that is very active. This can be a
handy way of getting help during off
hours or weekends when our office is
closed.
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DECWARE/High Fidelity Engineering
75 S. Riverview Dr. East Peoria IL 61611
(309) 822 5255 www.decware.com
Table of Contents!
_______________________________
Safety Instructions 2
Thank You 3
Technical Assistance 3
Unpacking 4
Getting Started 4
What’s What 5
Connections 6
Input Connections 7
Connecting Subwoofers 7
Installing Tubes 8
Tube Matching 8
Tube Substitutions 8
Biasing your tubes 9
Tube life 9
Operation 10
Clipping 11
Headphones 11
Burn in 11
Design 11
Voicing 12
Maintenance 13
Specifications 14
Service 14!
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OPERATION MANUAL MODEL : CSP3 - CLASSIC STEREO PREAMP! REV 1 MAR 2018
Unpacking
Your Preamp should be carefully inspected upon receipt for any damages that may
have occurred in shipping. If you detect any issues please contact us right away.
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Getting Started
If you have taken delivery of your preamp during cold weather please allow it to
come to room temperature before you plug it in and try to use it.
You will need three pairs of high-quality interconnects and a power cord as well as
the supplied tubes.
On the following page you will see diagram of your preamp. Please familiarize
yourself with it as well as refer back to it frequently as you become familiar with
how this preamp operates.
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OPERATION MANUAL MODEL : CSP3 - CLASSIC STEREO PREAMP! REV 1 MAR 2018
What’s what
Here is a top view of the CSP3 layout.
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POWER CORD
3A FUSE
POWER SWITCH
RIGHT OUTPUT
MONO OUTPUT
LEFT OUTPUT
RIGHT INPUT B
RIGHT INPUT A
LEFT INPUT A
LEFT INPUT B
RIGHT OUTPUT LEVEL
ADJUSTMENT
5Y3GT / 5U4G / 5AR4
6N1P / 6922
6N1P / 6922
6N1P/6922/6DJ8
LEFT OUTPUT LEVEL
ADJUSTMENT
RIGHT INPUT LEVEL
ADJUSTMENT
LEFT INPUT LEVEL
ADJUSTMENT
HEADPHONE JACK
HEADPHONE JACK
VOLUME
SOURCE SWITCH
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