ADD-Powr by Coherence Systems --- Power Conditioning Products


Recent research into power conditioning approaches and products brought ADD-Powr to my attention. This company, and it’s products, were previously unknown to me.

The company, Coherence Systems, is based in Santa Monica, CA. and has been in business for some time.

An introduction and general overview can be found within their ’About Us’ page: https://add-powr.com/about

Nordost (in 2008) purchased the QRT technology that these folks developed.

Bill Stierhout is the proprietor / owner and the brains behind the ADD-Powr product line.
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My initial impressions of the ADD-Powr Sorcer X4 are posted here:

https://add-powersorcerx4.blogspot.com
Copied below are posts from @scrootable_labs from my former thread.

@scrootable_labs Please follow-up with me should you want to edit or change any of your copied posts.

"I'm auditioning a Sorcer X2 now at our a/v studio, it's on the same circuit as a large format console and analog signal processing running off of balanced power. I've done quite a bit of testing in capturing mixes with and without the unit in place, with various cabling and so on.. would really value your subjective impression on how it's been performing vs. the Corelli.

the testing process here has resulted in a range of other holistic changes to the monitoring config & the overall result has been positive- it creates an unusual uniformity of response between components that can reduce phase-related anomalies in a larger system.  as it's been noted elsewhere, the unit responds to changes in position, sequence with the other components, possibly time of day & amount of time it's been working. upside there is that it's "tuneable" with a little elbow grease (provided you have other outlets and cables to try.) potential issue is that it does add another layer of complexity to a system & potentially variables that may be tricky to control- too soon to say on this end.


our unit (actually a x4) has settled in after a few weeks worth of tweaking and experimentation. it's been very helpful in refining our monitoring chain and outboard config to help manage phase relationships and spatial positioning in our mix projects.  the unit can simultaneously remove certain kinds of variances between one piece of gear and another- and make it a bit more apparent where other issues are coming from. very interesting effect hearing the way vintage analog components inter-relate on the sorcer's circuit- and of course, it's easily reversible by moving individual PSU's to a different electrical circuit (or simply shutting the unit off)

other key components currently on this circuit
MYTEK manhattan II
8 channel JCF tube converters
RME 6432 & 642 MADI-AES converters
BPT balanced power transformer
mostly wireworld IEC cables
Neve 8058 console
lots of harnesses and patch cables, analog outboard gear"