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Corner treatment -- PZCs a sure thing?

I'm looking for a set of room upper corner treatments for my living room. The upper corners probably are the only places in that space where I can use audio-specific treatments. The triangular pillow-type traps seem like a pretty sure thing; it sounds like only good can come from reducing the amount of energy being megaphoned out of those corners. I'm not so sure about the tunable pressure-zone controller devices (Michael Green). Are they as versatile and sure to be helpful as the pillow traps? Can anyone describe the comparative effects of these two approaches in their room and system?
jayboard
herman
1,974 posts
 
Take a look at Eighth Nerve. http://www.eighthnerve.com/

I don't know anything about the tunable stuff, but the Eighth Nerve Response series works very well and the Adept is even more effective.
jayboard OP
301 posts
 
Thanks, I was thinking about trying Eighth Nerve if I went the pillow route. Mejames, would you care to describe a little bit how you went about tuning your PZC's-- what was the basic method as you went around and tuned the various pieces (looks like you have a mini echo controller on the front top seam as well as the corner controllers) and what you heard change as you arrived at your current setup? I'd be interested in getting a better feel for how one uses these devices.
mejames
986 posts
 
Jay here's a link which explains the tuning better than I can
http://www.soundstage.com/revequip/db05.htm
yes also using four mini controllers 1 on each walls midpoint top seam. the corner four controllers really help considerably they virtually eliminate any slap echo your room has results are notes leading edges and decays are much more clearly rendered you hear more of your speakers and less room sound. Adding the mini controllers is similar effects. The room walls just are not there any longer.
jayboard OP
301 posts
 
Thanks, Mejames, I hadn't come across that article.
royjennen
7 posts
 
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.
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