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PS Audio Power Plant Premier THD Output Results

I recently purchased a used PS Audio Power Plant Premier.

After installing the unit and plugging in my LED TV, Oppo Blu-Ray Player, and Marantz Pre-Amp I checked the PPP's THD output results and I am getting a 1% THD on the output.

I sent an email to PS Audio and was told that the PPP should be providing me with an THD output of .4 to .5% in order to be working properly. The tech at PS Audio suggested that my PPP may need to have the regenerator rebuilt at a cost of $250 plus I have to pay for shipping both ways so I am looking at a $300 repair bill.

Basically, I would like to hear from any PPP owners to find out what your THD output readings are when you have your connected gear powered on and running through the PPP.

I am a bit skeptical that there is a problem with my PPP as I am getting a THD output of 1% which is only .5% higher than what PS Audio claims my PPP should be delivering.
southernphoenix
guinness
48 posts
 
Right now my mains input has 1.8 - 1.9 THD and the PPP improves that to 0.6- 0.7 THD. Occasionally I've had THD main input around 2.3, but the output THD is always the same.
guinness
48 posts
 
A few more thoughts...

The design of the PPP is such that the THD coming out in most cases will not be higher than what is going in. The exception is if you had extremely low THD on your mains.

The regenerator converts the AC to DC and then uses a DSP to generate new AC from that DC. The THD on it's output is more a function of that generator and it's AC amplifier.

In my experience, the PPP is a subtle improvement on all my components except my power amp. The power amp sounds less constricted when plugged directly into the wall outlet. If you get similar or better results in your situation, I'd also be hesitant in sending it in for repairs. You don't say what the THD is going into the unit, so there's no way to infer/extrapolate what benefit a repair may make.

Relax, have a Central Waters Bourbon Barrel Barley Wine and listen to some Chet Baker...
southernphoenix OP
11 posts
 
Thanks for all of the responses, I appreciate it.

I am currently getting 2.5% THD on the Input reading on my PPP and about 1% THD on the Output side.

I had sent a question about this directly to PS Audio a few days ago and they replied and said that because my incoming THD was so low that the best I could expect was about 1% THD on the output which is a contradiction to what another employee at PS Audio had told me last week.

Nothing like having two different answers from two different employees from the same company.

I now believe that one of the employees was simply trying to get me to send in my unit just to make an easy $250 despite nothing being wrong with my unit.
bmwmcab
63 posts
 
My THD input is about 6.0% and output is 0.7-0.8%.
jebsmith73
167 posts
 
PS Audio's service department is full of B.S.
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