Ampeg SVT 15 E jack/plug rattle
I have two of these cabinets, and they both have the same problem: The sound waves want to get out the rear, too, and they push hard against the only openings that are available: the 1/4" speaker jacks. At a decent volume, hold your finger against one of the two 1/4" jacks, and feel the blow!
Here is the problem in technical terms: the sound waves pressing against the rear wall of the cabinet rattle the speaker plug in the jack (rattle disappears the moment I press my hand against the plug).
First thing I did was replacing the stock square cheapo closed plastic jacks with genuine old style open Switchcraft jacks- their hot (tip) finger is a bit beefier, allowing for more pressure against the tip of the plug, but it still rattles the plug.
Tried different 1/4" phone plug brands, hoping for tighter tolerances between plug and jack, but the problem remains: the sound waves rattle the slightly thinner plug's sleeve against the slightly larger jack hole- and not indirectly, from the cabinet's vibration, but from the air pressure's direct agitation of the connection.
Short of switching to the speakon Neutriks, has anyone any ideas how I can stop the rattle without hiring a servant who holds the speaker plug while I play the gig?
Last edited by juniormarbles : 12-18-2012 at 03:57 AM.