Im just tweaking my install at the moment and have a reasonable amount of decent quality speaker cable (shielded and oxy free) left over. Ive been reading around and there seems to be alot of advice on the web regarding earthing the case of the amp to help avoid ground loop and i was just wondering if my left over HQ cable would do the job?

 

Thoughts?

Im just tweaking my install at the moment and have a reasonable amount of decent quality speaker cable (shielded and oxy free) left over. Ive been reading around and there seems to be alot of advice on the web regarding earthing the case of the amp to help avoid ground loop and i was just wondering if my left over HQ cable would do the job?

 

Thoughts?

 

your earth cable should at least match your power cable.

Should have made it more clear, the earth cable does match the power cable, this is just an extra earth for the amp caseing to make sure i get no ground loop

Should have made it more clear, the earth cable does match the power cable, this is just an extra earth for the amp caseing to make sure i get no ground loop

 

you should never need to do that ... decent RCA's .. twisted pairs and silver shielded should cure any noise probs .. and never put RCA's near othe cabling

 

need any advice give me a PM bud

 

John

Thanks john, it was more precaution really as im powering my laptop with an invertor so trying to reduce as much background noise as possible. I am using shielded rca cables and good earth/power leads but concerned the invertor might mess things up a bit!

 

Also, dont suppose in your ICE type role you would have access to an relays? Im after a relay that will trigger at 5v (from my usb port ) and pass 12v about 5amp on the switched side and really struggleing to find anything in the maze that is maplins online!

Thanks john, it was more precaution really as im powering my laptop with an invertor so trying to reduce as much background noise as possible. I am using shielded rca cables and good earth/power leads but concerned the invertor might mess things up a bit!

 

Also, dont suppose in your ICE type role you would have access to an relays? Im after a relay that will trigger at 5v (from my usb port ) and pass 12v about 5amp on the switched side and really struggleing to find anything in the maze that is maplins online!

 

i dont have one that will trigger from 5V.. im sure maplins will stock one .. the problem with laptops and In-Car Computers is the output voltage ISNT compatible with Incar amplifiers .. to reduce noise ratio u need a high voltage line so you can reduce the gain on the amplifier .. never set an amplifiers gain to max .. if you do suffer signal noise give me a PM bud ... i have just the solution .. and its not a loop isolator . ;) like most inexperienced installers would use

http://cpc.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=SW103 that should do it - available from http://www.cpc.co.uk part code SW103 ;)

Thanks guys, Im hoping my creative 5.1 soundcard should be fine to drive the amps but will find out over the next few days i guess! Cheers for the relay andy, i have been beating my head over the bloody maplin and rs components online offerings, its bloody impossible to find anything!

 

Any idea which pins on the usb port are the +5v ones, i can not remember from memory

http://www.usbman.com/Guides/BelkinMotherboard_cable_assembly.htm

Cheers vjay, so from that im guessing i need pin 1 to trigger the relay? And the connect the other side of the trigger to pin 4?