sub randomly thumping?

MrSo0h0o · Post by **MrSo0h0o** » Thu Nov 15, 2007 2:43 pm

hey guys i was wondering if anyone had an idea whats going on. lately my sub has been making random single thump noises. obviously i can only tell its going on when the volume is low. i made sure the RCA's werent touching any metal, and i moved my amp around a little to see if it made a difference but still the same. could this be something to do with my voice coils?

here is basic specs on my setup:
sub- RF Punch HE2 10" old school.. 300w rms.. dont remember the VC config
amp- Xtant A3001 300w rms @ 2ohm, 150w rms @ 4ohm

what is some basic troubleshooting i can do?

TIA

William from NOLA · Post by **William from NOLA** » Thu Nov 15, 2007 3:58 pm

I would redo your ground on the amp and HU. That's about all that comes to my mind right now.

JeremyC · Post by **JeremyC** » Thu Nov 15, 2007 6:54 pm

Yeah that sounds like a power or ground isue.

How do you have the ground wire on your amp set up?

MrSo0h0o · Post by **MrSo0h0o** » Thu Nov 15, 2007 7:26 pm

ground for amp is grounded on a bolt near the rear passenger seat belt setup. maybe it has become loose? would that cause that type of sound?

solacedagony · Post by **solacedagony** » Thu Nov 15, 2007 7:33 pm

Your speaker wire might not be secure. Or it could be grounding out. Or your RCAs could be moving at the HU or at the amp.

JeremyC · Post by **JeremyC** » Thu Nov 15, 2007 10:41 pm

Sure can. I use a self locking washer on mine so that they don't come loose on me.

cargodz · Post by **cargodz** » Fri Nov 16, 2007 4:25 am

JeremyC wrote:I use a self locking washer on mine so that they don't come loose on me.

^one of your bestest lil friends for grounding

Bwcad1 · Post by **Bwcad1** » Fri Nov 16, 2007 6:30 am

has nothing to do with your voice coils and never would. its something in your signal. without signal or power your vc are nothing but a winding of copper or aluminum.