andy.ros
Member
Registered: 23rd Aug 04
Location: Lancaster, Lancashire
User status: Offline
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Hey
I've just fitted some new front speakers, an amp and sub. I have the amp running fine, and its powering the front speakers ok. But i intend to use this amp to power my sub aswell.
Ive got the JBL-GTO75.4 amp and Infinity Kappa 12" sub.
Amp: specs here
Sub: specs here
its currently on a 3 channel set up, two channels for the front speakers and then bridged for the sub.
However the sub seems to do nothing, no power to it?! Is the amp powerfull enough for this sub? Even if there is only like 100watt coming from the amp, the sub should still do something?
cheers
andy
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andy.ros
Member
Registered: 23rd Aug 04
Location: Lancaster, Lancashire
User status: Offline
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I've just tired one of my old 6x9 on the channels that the sub is using, and nothing! is this a duff amp 
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Jake
Member
Registered: 24th Jan 05
User status: Offline
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if its 4 channels then two sets of RCAs should be feeding it
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andy.ros
Member
Registered: 23rd Aug 04
Location: Lancaster, Lancashire
User status: Offline
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yeah its 4 channel, there seems to be no power from the rear circuit at all  could it be settings on the amp?
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Ally
Member
Registered: 2nd Jul 03
Location: Pontypool Drives: a Skoda
User status: Offline
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Have you tried swapping the RCA's over
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andy.ros
Member
Registered: 23rd Aug 04
Location: Lancaster, Lancashire
User status: Offline
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 i only had two outputs from my headunit, going into the front ciruit of the amp! switched to the rear and it worked fine, so looks like ive got to get a 2 to 4 splitter!
sorry bout that, never thinked to look at the otherside of the amp 
cheers all 
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Ally
Member
Registered: 2nd Jul 03
Location: Pontypool Drives: a Skoda
User status: Offline
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Nah you dont, all you gotta do is plug the RCA's into where they were before, and there will be another set that says 'Out or Preamp out'.
Just get a short set of leads and connect the two remaining sets of connectors together and you'll be laughing
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