I had a big job extending the house so kind of lazy days here, the room is in use by bands but the acoustics is not finished. There is the same sub bass traps as originally built, so I just ordered the rest of the VPR's now from Don-Audio that will be about 25 sqm of VPR's to level the bass/mid-bass not the sub-bass, and diffusers from Jen's Eklund and GIK Acoustic's Versifusor. I hope I will get by to mount them and do some proper acoustic work in October. I'm kind of nervous that the tenants will think it sounds like crap with a neutral, diffuse room... I'm really having a hard time figuring out the diffusion. I ordered 3 or 4 I didn't decided yet, of Optifusor for low level diffusion on the back and a little side wall. It's only 8 sqm in a room of 60sqm with a surface area of about 200sqm, another 8sqm of Versifusor from GIK Acoustic's. It's not much. Maybe it will work.