An interesting story-
We have 15” folded-horn (Danley) subs in one studio mains system. The subs sit in insulated cavities in the front wall, supported by super-w pads on the concrete slab. Last month, one of the subs sit in”walked” out of the cavity about 8” during a loud session. The next day I pushed it back in and it happened again.
I pulled the entire box from the wall and when I played low freq sweeps, I could feel air leaking from between the speaker and the cabinet. I removed and replaced all the T-nuts and mounting bolts and sub has been well-behaved ever since.
We couldn’t hear any audible vibrations or harmonic effects even when I could feel the air leak, but there was enough physical vibration happening to move a 75 kg speaker cab.
We have 15” folded-horn (Danley) subs in one studio mains system. The subs sit in insulated cavities in the front wall, supported by super-w pads on the concrete slab. Last month, one of the subs sit in”walked” out of the cavity about 8” during a loud session. The next day I pushed it back in and it happened again.
I pulled the entire box from the wall and when I played low freq sweeps, I could feel air leaking from between the speaker and the cabinet. I removed and replaced all the T-nuts and mounting bolts and sub has been well-behaved ever since.
We couldn’t hear any audible vibrations or harmonic effects even when I could feel the air leak, but there was enough physical vibration happening to move a 75 kg speaker cab.
