Best room treatment

Advice, value, efficacy, selection:  GIK.

Their panels are relatively inexpensive, especially when compared to say ASC.

They have a number of products which are unusually effective at low frequencies.  These are among their priciest offerings, but again, cheaper than ASC and IMHO, sound better. They are tuned more broadly and the result, when used with care, is a more transparent response.

They also now have art panels, allowing you to get get panels to match any decor.

ASC is also excellent IMO. They will make a plan for you at low cost, like GIK. I’ve bought a lot from both and been happy with both. ASC was much earlier with panels that didn't absorb everything, and the ASC approach avoided overdeadening the room in the HF. I think GIK is now on that bandwagon with their Alpha traps, for example.

No bass trapping? In most rooms, that’s a must.

Synergistic HFT are far more effective than old-school acoustic panels. I know. I have extensive experience with both. https://systems.audiogon.com/systems/8367

Synergistic HFT are far more effective than old-school acoustic panels.

Bwahahahahahahahahahhahahahaha...

Maybe check out Artnovion panels... They look great and have extensive research behind them. artnovion.com