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Cullen P1000 mods

Posted by Deaf Ear (A) on March 4, 2007 at 12:19:28

In Reply to: Re: Poll: What AC Mains tweaks are in your system? posted by kenster on March 3, 2007 at 22:31:52:

Hi kenster,

I'm actually writing a review for these mods which I will post on this forum as soon as I can. It's gotten a little long and I'm trying to edit it down, or at least write an index so that readers can jump to the bits they're interested in.

Rick Cullen is an independent contract manufacturer with Cullen Circuits doing work for many clients and companies. His job as a production engineer is to exorcise bugs and design problems before final production assembly begins. Cullen Circuits built every PS Audio product until the new Power Plant Premier (which PSA chose to make in China to keep prices competitive). He has modded equipment for himself and friends for years, but has recently decided to make his experience available to the public.

The specific mods to my P1000 were:

• The original 16 filter caps were replaced with 'gold series' caps rated at 3300uf. Cullen Circuits go through a mountain of electrical parts. The 'gold series' caps they use are custom-made in Japan to Rick's high specifications by the same manufacturer who makes Blackgates, and he orders them in batches of many thousands.


• An additional 16x3300uf gold series filter caps were added, thus doubling the original filtering.


• Four Power Cells were added to the output of the P1000, thus splitting the outlets into four isolated zones. Power Cells are potted bundles of secrecy developed by PS Audio. They function as filters come noise gates.


• All of the original output cabling was replaced with silver wire.


• Numerous caps on the output boards were replaced with low ESR parts. The Equivalent Series Resistance of a capacitor measures how well that capacitor passes AC while blocking DC -- the lower the ESR the better. Yes, I had to look it up...


• Remote control functionality was added.

The effect on my system has been spectacular. There is a crystal-clarity that I didn't know was possible. Everything is rich and smooth and the performances really swing. Music is really alive, but at the same time there is a solid authority to the sound.

I have been posting my findings on the PS Audio website. I have a preliminary review written there if you're interested--there are specific responses to my impressions of the mods throughout the thread. I'm hoping to have the final version of the review finished sometime this week.

I hope this helps.

DE

This post is made possible by the generous support of people like you and our sponsors:

Atma-Sphere Music Systems, Inc.

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