splitting the pre-out

[Bushboy]

ive got 2 amps in my car but only 1 pre-out on the headunit. ive split it using a few little adaptors etc but i get a high pitched buzzing which increases and decreases in pitch with the rev of the engine.

any idea how i can split the pre out properly or would i be better off getting a new head with 2 or more preouts?

 

[GhostWKD]

ooooo same problem as me!

its to do with splitting the remote signal i think

 

[Bushboy]

its strange though because the buzzing is there sometimes and others its not. it waw actually there today when i was just running one amp.

also the buzzing was alot worse when i had my amp under the front seat

 

[NowIsGone1106]

yea you can get splitters that are better quality with gold plated ends ive got them on mine ive only got 2 pre-outs but running 3 outputs.


alfie

 

[Bushboy]

whered u get em from mate?

 

[GhostWKD]

Bassjunkies not sure if its .com or co.uk or whatever though lol

 

[jamie86]

Can't you just run an RCA cable from one Amp to the other they've prob got outputs on right?!

Edit: it's .com btw oh sod it have a link

http://www.bassjunkies.com

 

[Bushboy]

nope dont have outputs

 

[Alex]

you shouldn't splice the wires, you risk blowing the preamp in your head unit, you should get an amp which takes one set of phonos in and outputs 4 phono chanels out. The buzzing sound is most likely feedback from the amps.

EDIT: One of these
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=4950&item=5731591454&rd=1&ssPageName=WDVW

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=4950&item=5732125687&rd=1&ssPageName=WDVW

 

[Bushboy]

thanks alex! ive just bought the second one.

if it doesnt stop th squeeking then ill come after you with an axe

only joking heh. ital be useful anyway to stop interferance that i know is from the dodgy splitter that i use!

thanks

 

[syphon123]

hi
u just need a RCA Ysplitter. I use em on my amps and there fine. I got 3pre outs and use one of them to power both sets of 6x9s. just pop into halfrauds or somewhere and pick em up.

and in reference to GhostWKD splitting the remote lead wont make the noise. all that lead does it tell ur amp if it should be on or off. the hum will be comin from a bad earth OR in my case, make sure ur amp casing isnt touching any bodywork or the seat, I have mine all padded and isolated now and the humming is gone.

cheers
joe

 

[nwmlarge]

also worth checking that your amps are using the same earth and that they are of approximately the same length

 

[jamie86]

Both my Amps are earthed to different sides of the car and makes no difference???

 

[gaz.d]

i always used to earth my amps to different points on the car, but was told its best to earth to the same point

i never had no trouble with seperate earthing points either, just make sure earthing point is clean, bare metal

 

[nwmlarge]

didn't say it was essential just said it was a good idea
it wil clean up your signal

it will depend on what equipment your using too

halfords mutant gear won't make a blind bit of difference but higher end equipment will benefit

 

[jamie86]

Ah right k.....Well mines middle of road Kenwood kit

 

[nwmlarge]

you can improve your system by doing things like that but if your happy don't worry about it

 

[GhostWKD]

and in reference to GhostWKD splitting the remote lead wont make the noise. all that lead does it tell ur amp if it should be on or off. the hum will be comin from a bad earth OR in my case, make sure ur amp casing isnt touching any bodywork or the seat, I have mine all padded and isolated now and the humming is gone.

cheers
joe

amps arnt touching the bodywork, im gonna make sure the earths are bare metal, but i got this thing that gets rid of alternator interfierence? just incase its that

 

[jamie86]

OT; Not happy at the moment as i have blown both my front speakers :bang:

 

[Donkey]

try re-earthing the head unit, that sorted it out in my old car.
also make sure the phono cables and the power cables run down different sides as it will cause interfearnce.