Freinds problem

PlayStation3 · #1 02-25-2007, 04:06 AM

ok, so a person at works system is acting up. when you turn the volume up more then 10 (out of 62) the amp goes into protection mode. i told him to clean up his connections( it was a mess 2 inchs of exposed wire with tape cover it and stuff like that). and he did and it helped for a little bit then it started up again. it thinks that he is having a grounding problem with the car. now it does sound like a power/ground problem but how would i be able to fix that.

what i was thinking was running a cable from the negative terminal and attach it somewhere like in the corner of rear corner of the car and attach the amp ground near it so that then it should be getting that. but i'm not totaly sure if i get what grounded means in a car.

PaulD · #2 02-25-2007, 10:35 AM

the cars chassis is the negative wire. It sounds like the gains are set wrong.

PlayStation3 · #3 02-25-2007, 01:21 PM

alright thanks i will look into that. i assumed that it was set right. btw was i right about how grounding works in a car

Mannyb18b · #4 02-25-2007, 04:04 PM

I couldn't really understand what you were saying about the grounding but it sounds wrong.
To ground your amp run the shortest wire you can from the ground on the amp to the chassis.

Like Paul said sounds like gains are set wrong or the amp is seeing to low of an ohm load.

PaulD · #5 02-25-2007, 07:03 PM

I didn't even think about impedance loads .... what amp and how are the speakers connected ?

PlayStation3 · #6 02-25-2007, 10:02 PM

3 svc 4 ohm subs. it looked series

pimprolla112 · #7 02-26-2007, 12:05 AM

Why would he run it in 12ohms. Maybe series/parellel. I had a friends amp tht did it. ended up being a blown sub.

But check the wiring, it could also have a little extra wire exposed and when it hits that wire might be hitting the other lead to the sub or the subs chassis.

PlayStation3 · #8 02-26-2007, 11:42 AM

it might be a blown sub i will try all this next time i see him which i think will be tomorrow. oh and he would wire it in 12 ohms because he knows nothing about audio period and makes no attempt to learn.

dbfreak147.5 · #9 03-03-2007, 11:25 PM

Quote:

originally posted by pimprolla:
Why would he run it in 12ohms. Maybe series/parellel.

that is incorrect 3 svc 4 ohm subs make an ohm load of 1.34 and your friends amp probably doesn't hold stable below 2 ohm so wire two subs in series to one channel and wire the other one normal to the other channel

PlayStation3 · #10 03-03-2007, 11:46 PM

actuly you are worng series all you do is add up all the subs ohm load. and it was series paraelle and it is not his amp we disconnected his amp and moved it to my car and and we disconnected my amp and we hooked up my rca and remote and power/ground but with his subs and we got it to work. so i told him to go buy a new amp kit and rewire his stuff.

pimprolla112 · #11 03-04-2007, 12:55 AM

Quote:

Originally Posted by PlayStation3

actuly you are worng series all you do is add up all the subs ohm load. and it was series paraelle and it is not his amp we disconnected his amp and moved it to my car and and we disconnected my amp and we hooked up my rca and remote and power/ground but with his subs and we got it to work. so i told him to go buy a new amp kit and rewire his stuff.

Thank you playstation. And dbfreak wiring seperate channels to different impendances isnt a good idea. What brand subs. Jw wondering cause theres a MTX setup that is prewired for 4 ohm.

dbfreak147.5 · #12 03-04-2007, 01:05 AM

thank you pimprolla for telling me that

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