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DIY HiFi Supply Parts and Kits from Diy HiFi Supply

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Old 19th April 2014, 10:39 PM   #1
sandston is offline sandston  United States
diyAudio Member
Join Date: Sep 2012
Location: Los Angeles
Default Help with DIY Active Bias System

I would like to incorporate DIY Audios Active Bias System boards into my Crown SXA in order to stabilse the bias and help prolong the the life of my EL37's. I am having a little trouble working out the connections and was wondering if some of the more knowledgeable board members here could help me flush this out. I have attached a schematic with the ABS module on it.

There is a link to DIY audios page here. The PDF link provides a lot of additional info on the product.

ABS-Active Bias Control Module | DIY HiFi Supply

Attached Images
File Type: jpg SXA Schematics with Bare ABS Board.jpg (853.1 KB, 144 views)
Attached Files
File Type: pdf ABS1.1 (1).pdf (288.8 KB, 33 views)

Last edited by sandston; 19th April 2014 at 10:43 PM.
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Old 10th August 2014, 12:59 AM   #2
goneill is offline goneill  New Zealand
diyAudio Member
Join Date: Jan 2009
I'm afraid I know nothing about the Crown, and I think maybe this reply has come too late for you anyway, but here is a diagram of how I loaded the ABS into my Ella amplifier:

Ella layout diagrams

Also there are some photos here:

Ella build photos

As you've probably found out by now, it's well worth the effort!
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