Daniel_Corsa
Premium Member
Registered: 21st Apr 04
Location: Wigton, Cumbria
User status: Offline
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Got my amp today wired it up and all is well but the fucking sub won't hardly move
someone has told me its something to do with treble, the sub is working but you cannot tell unless you are touching it as the bass can't be heard!
Is this to do with the treble?
How could it be fixed?
Set up is:
JVC head unit
12" Xplod sub
Alpine M350 amp
need some ideas as i don't know what to do its beyond me now!
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AdiSRI
Member
Registered: 1st May 02
Location: Berkshire
User status: Offline
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have you tried adjusting the gain on the amp?
If its turned right down then the sub wont do a lot as the amp wont be putting out hardly any output.
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Daniel_Corsa
Premium Member
Registered: 21st Apr 04
Location: Wigton, Cumbria
User status: Offline
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Yup gain was up, been to halfords today they tested the sub and that wks fine so its a problem with the amp or my wiring!
Connected the speaker wire upto my speaker and it wouldn't even move it so no wonder it won't move the amp!
Terminal wire is fine,
Earth is connected to rear seat folding mount
Pre out on head unit then to amp connected fine
Live on + battery terminal
Halfords told me cud be the head unit but they just wanna rip you off and make you buy a better one as another halfords store said it shouldn't matter!
more fiddling around tmoz i think hehe!
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NeilsC
Member
Registered: 6th Dec 00
Location: Middlesex drivin a Puma Racing on FRS 18's
User status: Offline
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have u tried changing the speaker cable arouns which goes from the amp to the subs, i have done this so many times, connected + to - hehe
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Dom
Member
Registered: 13th Sep 03
User status: Offline
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get a multimeter and test the preouts on your HU (Pin on the preout is the + and the shielding is the - on each preout pair connector) and see what voltage it is pumping out  Then match it against what your HU should produce on the preouts, this will tell you whether you HU preouts are buggered.
Also remember, that the preouts are volume controlled, so make sure you have your HU up to a nice volume before testing
If your preouts are ok mate, i would see if you can borrow another amp to test your setup Or measure the wattage output on the speaker terminals.
Also, it doesnt matter what way you connect the sub to the amp, as its AC voltage. Just make sure that if you have another amp and sub. that you wire it the same, otherwise you will end up with phasing and its sound very odd 
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infinitycorsa
Member
Registered: 3rd Apr 02
Location: Stourport-on-Severn, Hereford and Worcester
User status: Offline
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have u flicked the filters over on the amp???
Are u running it stereo? or wired worng from amp?
Perhaps if u did a quick paint shop how u have set it up we could help u
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Daniel_Corsa
Premium Member
Registered: 21st Apr 04
Location: Wigton, Cumbria
User status: Offline
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Got it sorted now, had a gud fiddle about tnite and it started moving so turned the gain up a bit more and off we went!
Don't know what was up but it wks so im happy,
Cheers for all the help guys!
April '06' Corsasport Feature Car | Aug '08' Total Vauxhall Feature Car | Spring '09' Fast Car Feature Car
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