About to invest in room treatments; GIK, RealTraps, DIY -- what is your experience?


I'm reaching the point soon where I'll invest in some treatments for my two channel listening room. Standmount speakers with tube amps. Room about 28x14ft with low ceilings, 6.5ft. Probably different kinds of treatments are needed. I'm not exactly sure yet what I'll need or how much to spend. This is not my final listening room, but I won't be able to configure another one for a few years.

I've seen many people tout GIK on this forum and I'm already communicating with them a bit. I will also reach out to Real Traps and possibly others. I do not feel bound to go with just one company or solution, so if you've mixed and matched, I'm curious about that, too.

Any recent comparisons between these two, or others? Do you have stories of good or not so good products or service? Any comments about the value of competing products? I'm not super handy or have a lot of free time, but DIY is also considered. 

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Here is a really interesting video on DIY panels made from towels. The guy tests several different materials and cotton towels work the best. I haven't built any yet but I'm going to try it.

https://www.youtube.com/watch?v=pABvTWSxOes&t=29s
Just note that his test is technically incorrect. He is testing for sound blocking, not sound absorption though given the density of towels, I have to expect they would still work well especially at high frequencies. It's a cool hack.

"Honey, where are all the towels?"
Have you tried doing the MMM with REW in your primary listening position? I would concentrate on the problems you find that result from tests obtained in the primary listening position. Once you have fixed as many as possible with acoustic treatments use some room correction. I know everyone has differences in their preference but I don't like dead rooms I like them a bit lively. 
Excellent experience with ATS. I had a GIK order in place for a couple weeks then they told me it was going to like 8 more weeks. Canceled it and placed an order with ATS. Fast shipping and I actually saved some money and got the upgraded Gilford cloth. Quality was excellent and all the mounting hardware was perfect, plus they also provide a really nice template to tape on the wall and mark the holes. Easy.
I have experimented with pillows in the corners and also foam on panel.

The pillows in the corner were to simulate a bass trap and they work quite well. I think purchased GIK Impressions bass traps and they were a mild improvement over the pillows.

As for the foam, everywhere I tried it the sound got worse.

I've also tried pillows in the rear and along the rear side walls. No noticeable audible effect.

I've also experimented with the Stillpoints Aperture. In my room, they did nearly nothing. At my dealers, they provide minimal/moderate help on the front wall. I'd want to experiment first before commiting to $750/panel.