Sub/ Amp power issue
- crashbanggg
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Sub/ Amp power issue
I have just tried to install a sub/ amp to my existing setup (Phillips CEM300 with Alpine 6x4's), however I can't seem to get power to the amp? I have connected the remote output from the amp, to the 'Subwoofer out' on the head-unit (By cutting off the plug and twisting the wires together), but still no power. Does anyone have a clue what it could be?
My only other thought would be to split the wire that is powering the Headunit to power the amp as well... or is that a stupid idea?
I'll be getting my hands on a multimeter tonight if I can use that to test anything?
My only other thought would be to split the wire that is powering the Headunit to power the amp as well... or is that a stupid idea?
I'll be getting my hands on a multimeter tonight if I can use that to test anything?
1992 GT2
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Re: Sub/ Amp power issue
assuming that you have got the trigger wire connected to something that goes live when you turn the head unit on, check that the main power and earth to the amp are connected properly (particularly the earth connection to the bodywork) and check that the fuse at the battery connection is ok, and the fuse on the amp
- bengould
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Re: Sub/ Amp power issue
Ignoring the 4 channel amp in the middle and the capacitor you should have something like this....
If the amp won't turn on you can TEMPORARILY bridge the Main 12v to the remote to see if the amp is at fault.
Ben.
If the amp won't turn on you can TEMPORARILY bridge the Main 12v to the remote to see if the amp is at fault.
Ben.
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Re: Sub/ Amp power issue
Please don't say you're attempting to power the amp solely by using the blue lead from the head unit..
Re: Sub/ Amp power issue
It's a bit confusing to read but that's what I think he's doing.
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- crashbanggg
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Re: Sub/ Amp power issue
Sorry if I haven't explained it very well! I have power to the amp via a power cable directly from battery (only at the point at which I reattached the battery terminal was I made aware that the alarm does in fact work... I never jumped so much in my life)
The issue is, although i am 99% sure it's wired up correctly, the amp isn't powering up when the radio is turned on. As it stands, I have removed the plug on 'sub out' wire from the back of the headunit and attached it to the remote wire from the amp... Which I think should work... But it doesn't.
This is what it looked like before I chopped the plug:
Il test with a multimeter tomorrow to see if the wires get any power when the headunit turns on and see how it goes from there.
The issue is, although i am 99% sure it's wired up correctly, the amp isn't powering up when the radio is turned on. As it stands, I have removed the plug on 'sub out' wire from the back of the headunit and attached it to the remote wire from the amp... Which I think should work... But it doesn't.
This is what it looked like before I chopped the plug:
Il test with a multimeter tomorrow to see if the wires get any power when the headunit turns on and see how it goes from there.
1992 GT2
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- fonzooorooo
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Re: Sub/ Amp power issue
That's the wrong wire you've chopped... That's AUDIO out to the sub... Your remote should be connected to the power antenna lead (that becomes live when the headunit's switched on, so the antenna goes up)
+1 on Nate's query about the earth too.
+1 on Nate's query about the earth too.
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- crashbanggg
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Re: Sub/ Amp power issue
I had wondered whether that would be the issue! Il have a play once iv finished lectures.
1992 GT2
- crashbanggg
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Re: Sub/ Amp power issue
And the earth is currently on the same earth as the rear lights, however I'm thinking of moving it to the rear seatbelt belt bolt bit if that would be ok/ work?
1992 GT2
- crashbanggg
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Re: Sub/ Amp power issue
Hooked it up to the Ariel wire and it works perfectly, happy now! Thanks for all the help!
1992 GT2
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Re: Sub/ Amp power issue
Out of curiosity, where are you taking the audio feed for the sub from? considering you chopped the audio sub out off lolcrashbanggg wrote:Hooked it up to the Ariel wire and it works perfectly, happy now! Thanks for all the help!
- crashbanggg
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Re: Sub/ Amp power issue
The headunit has regular RCA (?) outputs as well as the cable so its run via that!Jack92 wrote:Out of curiosity, where are you taking the audio feed for the sub from? considering you chopped the audio sub out off lolcrashbanggg wrote:Hooked it up to the Ariel wire and it works perfectly, happy now! Thanks for all the help!
1992 GT2
- fonzooorooo
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Re: Sub/ Amp power issue
If you reattach the plug (it'll be a 2 core wire - core and screen) , it's already summed mono, and is likely to have a low pass, and potentially a level control on the headunit.
Any earth is OK - as long as it's a good connection. - If it works happily how it is, leave it alone!
Any earth is OK - as long as it's a good connection. - If it works happily how it is, leave it alone!
What I do:
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- fonzooorooo
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Re: Sub/ Amp power issue
Oooh, i see you're a part-time local too (I'm just at Coalville) ... I'm rocco-less these days, but we have a bit of a fleet of other '90s VWs - I'll give you a wave if I see you!
What I do:
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