Diffuser decision for ceiling


Would like to get some feedback and info. 

Trying to stick with Vicoustic products since its more easily available here in Canada.

My room is 19 x 14 and the ceiling height is just shy of 7 1/2 ft. (7 "4 roughly).

I already have acoustic panels setup in the room. I already have plans to add diffusion in the back and front walls based on recommendations. 

The last piece I'm missing is the ceiling. 

I kind of rushed and had bought a used set of Vicoustic Multifuser DC2 in order to use. My plan was to install 3 in one line covering the Left, Center and Right channel speakers first reflection point on the ceiling.

However, after using ChatGPT, googling and got some advice from a local store, they said that I would be better off using the Vicoustic VicPattern Ultra Wavewood MKII. Both DC2 and Wavewood would be installed flush to the ceiling.

Chatgpt suggested leaving 2-4 inches spacing in between them versus having them stuck all together. 

What does everyone think? Before I invest in the ceiling installation. 

I have floor standing speakers SF Olympica III and my center is a SF Sonetto CII. Let me know if more info is needed, thanks

skads_187

@sgordon1 

I would like to see the studies that are associated with the statement: "Scientific measurement shows that Acoustic Discs reduce cumulative spectral decay from 30 to 50 percent between 80 to 15000 Hz." I could not find any on their website but perhaps I just didn't look closely enough.

GIK and Vicoustics have data/graphs that demonstrate their effects and effectiveness. I don't think you should settle for less when it comes to acoustic treatment. 

if you’re able to take time to learn and operate REW. One could easily conclude that you could take your DIY skills and manufacture your own panels for easily half the cost. 

@gkelly  im more of a tech guy versus a handyman sadly. but i probably could make an acoustic panel for sure, but I dont think I need any more for now. 

Is there any threads on this forum about learning REW? or I guess i need to go to some other ones, wonder if chatgpt can maybe help. 

Here's what I think you should do: Treat the ceiling

What I think you should avoid however is diffusion there.  Your ceiling is too low.  You want pure absorption. 

Further, please keep in mind that treating 1st reflections ALONE is usually not very useful.  You need a minimum critical mass of room control before that really helps.  In other words, yes, treat the 1st reflection points, but plan to have 2-4 x more treatment than that. 

I like to think of the room as a cross, with the arms of the cross the speaker locations.  You want diffusion at the 4 points of the cross, absorption elsewhere.   That is, directly between the speakers, to the sides of the speakers and behind the listener are good places for diffusion.  Absorbers elsewhere, and possibly bass traps in the corners based on room response. 

Thanks @erik_squires 

I like this info:

I like to think of the room as a cross, with the arms of the cross the speaker locations.  You want diffusion at the 4 points of the cross, absorption elsewhere.   That is, directly between the speakers, to the sides of the speakers and behind the listener are good places for diffusion.  Absorbers elsewhere, and possibly bass traps in the corners based on room response. 

I think what I will do is wait for the ceiling, treat the front and back walls first. Try to learn REW before that , take measurements and go step by step.

The side of speakers, at the very end, i would need to remove the 1 panel on each side and replace it with diffusers.

My front wall (behind the speakers in the middle) I was told to use QRD diffusers.