Looking for advice Yamaha PM1000 main summing buss

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JW

Well-known member
Joined
Jun 8, 2005
Messages
1,100
Location
Portland USA
I have a question about the master strip for the Yamaha PM1000 mixer. It's a passive summing mixer, usually 16 channels, sometimes 24 or 32 w/ 33K summing resistors.

Here's a link to a schematic of the summing bus:
http://www.gearslutz.com/board/attachments/geekslutz-forum/161595d1267927139-yamaha-pm-1000-full-mixer-output-module-question-yamaha-pm-1000-master-monitor-output-module-schematic_-labeled-.jpg

I'm wondering if there would be a benefit to raising the value of some of these caps.
Looks like C1 (.1uF)? C1 in the input strips is 3.3uF But should I go that high? (.1uF to 3.3uF is a big increase)

C7? Maybe?

And C12 appears to be the equivalent of C37 in the input strips, which the rackers commonly increase from 33uF to upwards of 220 to 333uF. Here, it's a 100uF cap



???
 

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