Heard about this product and gave it a shot. One of my bass amps is in church with very high vaulted ceilings A frame by design. had a hard time hearing my G-K 2 12 bass combo. Was using scrap wood to tilt amp back slightly. Could hear it a bit better but still sounded bad. When I received the GRAMMA it was like night and day. Instant WOW!!! I could hear all tha I needed. The sound man was happy as I didnt need the extra volume any longer. Bought a second one for my small gig rig. Placed my SWR 210 cab on it and again WOW!!! In short I dont leave home without it. Well worth the money and an excellent design by Auralex. My only complaint is it wont effectively hold the rated weight capacity. Had a leaning tower when I used my full bass stack.