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Lonely Raven · 8th November 2009

So now that I have a house, and a goodly sized living room for a proper home theater, I've decided to go all out with the room treatments. Huge corner bass traps, broadband traps at key points, flutter breaker diffusers, and proper QRD diffusers.

While researching QRD diffuser designs, hoping I'd stumble into a completed design I could just clone...I stumbled into GearSlutz and all these great diffuser builds, as well as this QRDude software.

QRDude: Quadratic Residue Diffuser calculator

Collo, who writes the software is a member of these forums, who has been kind enough to answer questions and tweak the software to help make it more user friendly for the DIY guys like me. (if you find the software as useful as I have, throw him some $$ for his efforts!)

For better or worse, the following is my Prime 29 build for the rear-side walls of my home theater...used to help break up the flutter reflection between the side-rear speakers, and help liven up the surround sound in the back of the theater. My ultimate goal is a live end - dead end with the speakers in front being the dead end, and the surround being very *live*.

Here is a screen shot of the Specs of my side-rear diffusers.

And the MaxData showing the dimensions (which I have printed out across several 8.5 X 11 pieces of paper, and on a laptop screen in the workshop. On the high rez image, we can easily read the well depth measurements. Note: that's 841 1" wells there...yes, I'm a glutton for my own self punishment.

Once I got this far, I ran to my local lumber yard which is about 45 minutes away, and I stocked up on panels for this and a subwoofer project I have in the works. I'm on vacation this week, so I'm looking forward to making progress on both the diffusers, and the 21" woofer in a 15 cubic foot box! Here are all the panels stuffed into my Scion xB. Poor car, it used to be a show car...now I use it more like a truck. The lumber yard was nice enough to cut all six panels crosswise so I could fit the 4' X 4' sections in my car and not have to rent or borrow a truck.

From here on out, it's all about cutting and assembly!!

8th November 2009	#1
Lonely Raven Gear maniac Join Date: Nov 2009 Location: Bolingbrook, IL Posts: 230 Thread Starter	Prime 29 Diffuser Build - Using QRDude So now that I have a house, and a goodly sized living room for a proper home theater, I've decided to go all out with the room treatments. Huge corner bass traps, broadband traps at key points, flutter breaker diffusers, and proper QRD diffusers. While researching QRD diffuser designs, hoping I'd stumble into a completed design I could just clone...I stumbled into GearSlutz and all these great diffuser builds, as well as this QRDude software. QRDude: Quadratic Residue Diffuser calculator Collo, who writes the software is a member of these forums, who has been kind enough to answer questions and tweak the software to help make it more user friendly for the DIY guys like me. (if you find the software as useful as I have, throw him some $$ for his efforts!) For better or worse, the following is my Prime 29 build for the rear-side walls of my home theater...used to help break up the flutter reflection between the side-rear speakers, and help liven up the surround sound in the back of the theater. My ultimate goal is a live end - dead end with the speakers in front being the dead end, and the surround being very live. Here is a screen shot of the Specs of my side-rear diffusers. And the MaxData showing the dimensions (which I have printed out across several 8.5 X 11 pieces of paper, and on a laptop screen in the workshop. On the high rez image, we can easily read the well depth measurements. Note: that's 841 1" wells there...yes, I'm a glutton for my own self punishment. Once I got this far, I ran to my local lumber yard which is about 45 minutes away, and I stocked up on panels for this and a subwoofer project I have in the works. I'm on vacation this week, so I'm looking forward to making progress on both the diffusers, and the 21" woofer in a 15 cubic foot box! Here are all the panels stuffed into my Scion xB. Poor car, it used to be a show car...now I use it more like a truck. The lumber yard was nice enough to cut all six panels crosswise so I could fit the 4' X 4' sections in my car and not have to rent or borrow a truck. From here on out, it's all about cutting and assembly!!