Corner treatment -- PZCs a sure thing?

Hi Jayboard!
I only noticed your question today.
If you're in doubt about the PZCs as corner treatment (who's gonna blame you for that?) you could try to build your own, first.

Here are some pictures as to give you an idea as how to imitate them:
Rear view: http://www.htforum.nl/yabbse/index.php?action=dlattach;topic=47451.0;attach=32143;image
Front: http://www.htforum.nl/yabbse/index.php?action=dlattach;topic=47451.0;attach=32144;image
Side: http://www.htforum.nl/yabbse/index.php?action=dlattach;topic=47451.0;attach=32145;image

Now, the wooden face plate is something very important!
Standard PZCs have cherry face plates, but you can choose any wood of your likings. Check out some guitar building sites for inspiration.
Use very thin layers of VARATHANE to treat the wood;
making it hard on the outside but soft on the inside of the wood panel!
Then proceed like this:
http://www.htforum.nl/yabbse/index.php?action=dlattach;topic=47451.0;attach=32146;image
Make sure there are washers between the face plate and the frame: http://www.htforum.nl/yabbse/index.php?action=dlattach;topic=47451.0;attach=32147;image
Tuning the face plate can be accomplished by attaching a tuning bolt to the front bracket and the face plate: http://www.htforum.nl/yabbse/index.php?action=dlattach;topic=47451.0;attach=32148;image

Good luck!

Kind regards,
Roy.

Mejames
What are your thoughts on combining PZC's with other room treatments? I have a pair of ASC Shadowcasters(tunable version and no longer available) that control first reflections and can be made to absorb and reflect at the same time.

The Eighth Nerve Adapt product is considerably better than the PZC. PZC's might work for you if you have a very large room, but I found them to be incredibly absorbent and they shut the sound down in an average sized room.

My will be 16 x 11 x 10...PZC's too powerfull?

I built my own triangular corner treatments. I just copied the Michael Green model, and did the other two types as well at the same time. The Jon Risch information that I picked up along the way, among others, REALLY helped a lot. The end product uses burlap (most acoustically transparent - you don't want the material reflecting), stuffed with long hair carded wool (best stuffing sonically). All of the materials cost me about $55, plus the sweat equity.

The improvements were not subtle. Highly recommended.