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.
david_ten
I'm placing an order today for a Wizard and have ordered 3 more ElectraClears after having one in my system late last week. I've had similar components to ozzy and when I saw he had success with an X4 I thought of giving Add-Powr a try. David_ten turned me on to Stealth usb cables so I figured his judgement on Add-Powr to be good as well so I'm looking forward to seeing and hearing how more Add-Powr products perform.
@t_ramey   Congratulations on going forward with the Wizard and the additional ElectraClears!  Keep us posted...
Has anyone tried the lower models below the Sorcer x2 or x4?  The Wizard, Symphony, and Symphony Pro are much more reasonably priced.  I wonder how much improvement they bring to the table compared to the pricier Sorcer models.  Has anyone listened to multiple models that can offer up some comparison notes? 
@danny2323

They are similar outside of the transformers/coils and number of "QRT" units. This affects the conditioning of the power the units receive, and ultimately the sound. Bill's original QRT units could be tuned by cleaning the power it was fed with power conditioners and power cords, and this seems to be similarly true with these new units.