GIK alternatives

Audimute

Yeah, Vicoustic Multifuser DC2 for diffusion. Absorbers are easy to do DIY; just cut a 2’ x 4’ sheet of 1/2" ply into four 6" widths, make a 4’ x 4’ frame and fill it with Owens Corning 703, cover with grill cloth. Easy peasy.

You can also check Vicoustic i find them very good & have ordered a few .
I too found GIK a bit too expensive comparatively .

Only good experiences with GIK. Shipping has gone up for everyone. Last time I ordered was previous to the supply chain issues and I had to wait a couple of months. I made many of my panels, but utilized GIK for the low frequency absorption such as bass traps. For the DIY panels I ordered the Guilford of Maine material from GIK as they had the lowest prices. The design of wood covering over the acoustic material is lovely. I was going to move some from the home theater room to my two channel room, but my spouse protested as she likes the way they look.

I recommend Acoustic Design Works. Got two 2" absorption panels covered in fabric, 24 inch hexagon, for only $107 plus the shipping, which was reasonable.

I do like the GIK diffuser/absorption combo panels that I've seem on their website. They are pretty nice looking and available in several finishes and designs/patterns. 

@jpmanomet 

I agree, great company. I too ordered a panel as well as a roll of fabric, showed up at my door in just 3 days. Nice quality. 

+1 with ATS. I recently ordered a case of panels and a roll of cloth that showed up 4 days later. Good selection, pricing and availability. The in house fabrication offers plenty of custom options as well. Responsive to phone and email no problems.

I just ordered from ATS. What a positive difference. My diffusion panels will be built and shipped in 2 days. I’ll update you on the quality. Thx again!

Thx for the suggestion. Is there a company that you‘ve used with a positive experience?

I don't have personal experience with them but ATS is a less expensive brand than GIK.  Let me know how that works out.

https://www.audiogon.com/listings/lisaech1-pi-audio-group-diffusers-room-treatments

these have served me well...  good guys, responsive...

you can just google :

“ acoustical panels”   and that will bring up a bunch of choices