Wayne Parham Messages: 18683 Registered: January 2001
Illuminati (33rd Degree)
I generally suggest stands if subs are used, and no stands if subs aren't used. You can use angled risers instead.
Baffle step is actually a directivity issue, and all my larger speakers employ controlled directivity. The cornerhorns use the corner to help set the pattern, and while others don't, the baffle is large enough to create some directivity down into the modal region, where directivity begins to lose its meaning. That's where the multisub configuration will help.
Infrasonic Messages: 17 Registered: March 2010 Location: Clovis, CA
Chancellor
Hey Wayne!
I just love bringing up other peoples threads.
I've read that you recommend stands for the Pi4 when used with subs and that you also prefer a upwards tilt to them. This pic for instance:
I've read all over on your site but I have never seen many details regarding the stands that you use. I will have a trio of Pi4's behind an AT screen of 100" in size and need approximately 24" of lift for them to clear the bottom border of the screen.
How did you build yours and what angle would you recommend if I were to tilt them? Also, I love the love of your Pi4's. Is that a fancy wood or veneer? They are gorgeous!
Wayne Parham Messages: 18683 Registered: January 2001
Illuminati (33rd Degree)
The stands in that photo are 12" tall and have 7° tilt. There are lot of competent stand builders that can build to order. Most have standard sizes but will also custom build. They need to be a little larger than what some shops normally build but that's no problem. Just make sure the base is wide enough to support the speakera and be stable.
You can certainly make your stands 24" tall. I wouldn't angle them at that height though. Put subs within about 5 feet of the left and right mains and low-pass them fairly high, like 80hz to 100Hz. These are what I call "flanking subs" and they'll smooth the upper room modes. You can also put subs further away, low-passed at a lower frequency. These more distant subs will provide more smoothing in the lower modal region.
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