Subscribe to Our Youtube Channel
Related Manuals for Decware Zen 25th Anniversary Edition
Summary of Contents for Decware Zen 25th Anniversary Edition
- Page 1 OPERATION MANUAL MODEL : CSP325 - ANNIVERSARY STEREO PREAMP REV 1 MAR 2021 OPERATION MANUAL Anniversary Reference Vacuum Tube Preamplifier Model CSP325 PAGE WWW.DECWARE.COM...
-
Page 2: Safety Instructions
15 Refer all servicing ot qualified service per- read and followed the steps in this Follow all instructions. Refer all service to Decware or a sonnel. Servicing is required when the ap- Do not use this apparatus near water. complete manual. -
Page 3: Table Of Contents
We also have a strong online support Design forum that is very active. This can be a handy way of getting help during off Voicing hours or weekends when our office is closed. Maintenance Specifications DECWARE/High Fidelity Engineering Service 14 PAGE WWW.DECWARE.COM... -
Page 4: Unpacking
It maintains the speed and transparency required to go in front of our anniversary amplifier and uses the same copper foil capacitors in both the signal path and the power supply. Additionally the unit was changed from single to dual volume controls, one for each channel. PAGE WWW.DECWARE.COM... -
Page 5: What's What
MODEL : CSP325 - ANNIVERSARY STEREO PREAMP REV 1 MAR 2021 What’s what Here is a top view of the CSP325 layout. 3A FUSE OUTPUTS A INPUTS B SIGNAL SIGNAL Classic Stereo Preamplifier Model CSP325 5U4G 6N1P 6N1P 6N5P OUTPUT OUTPUT MUTE FRONT 25th Anniversary GAIN GAIN PAGE WWW.DECWARE.COM... -
Page 6: Connections
If you notice the pins are bent they must be straightened prior to inserting the tube into the socket. A simple way to accomplish this is to have a tube pin straightener available from Decware. tube pin straightening tool from Decware PAGE WWW.DECWARE.COM... -
Page 7: Input Connections
Your CSP325 contains a silver input selector switch and the switch box shown above is also using silver switching and silver/Teflon internal wiring. This component is called the ZSB and available on the Decware web site. Connecting Subwoofers The CSP325 has dual RCA outputs, meaning you can connect powered subwoofers up to one of the two sets. ... -
Page 8: Installing Tubes
1940s rectifiers and remakes are not compatible since they want to see less than 10uf 500V capacitors. When buying fancy rectifier tubes always be sure they will be compatible with 47uf 500V capacitors. The recommended rectifier tubes for this preamp are: 5U4G, 5AR4, 5Y3GT PAGE WWW.DECWARE.COM... -
Page 9: Biasing Your Tubes
While we ship the amp with somewhat matching pairs it is nearly impossible to get an exact match so they may look slightly different. These tubes can be removed if you don’t want to see the light show they provide. PAGE WWW.DECWARE.COM... -
Page 10: Operation
4) your preamp is now adjusted properly for your amplifier. 5) further experimentation can be made by adjusting the gain control on the amplifier if it has one relative to the output level settings on the CSP325. PAGE WWW.DECWARE.COM... -
Page 11: Clipping
The pair that is being driven is wired so each triode is in series (SRPP) giving it both massive output levels but also low output impedance to drive long cable runs. PAGE WWW.DECWARE.COM... -
Page 12: Voicing
6N5P to be a nice balance of each but with a touch less gain. Of course there are many more tubes than this to try, but these are the four basic starting points. PAGE WWW.DECWARE.COM... -
Page 13: Maintenance
This is especially true if the preamp has sat for any length of time (months) without use. PAGE WWW.DECWARE.COM... -
Page 14: Specifications
For service please contact us by phone or by email. You can find both on the contact form of our web site, www.decware.com We can help you troubleshoot your system and help you determine what is causing the issue that you’re having. Everyone can save themselves a lot of trouble by having a spare set of known good replacement tubes on hand.
Need help?
Do you have a question about the Zen 25th Anniversary Edition and is the answer not in the manual?
Questions and answers