Cadence Amp Vibrating Sub - No Music!

[sweefu]

Hi everyone, i tried a search but couldnt find anything. I have a cadence fx series i think it is, 500wrms at 2ohm (monoblock). i tried to hook it up and when you turn the music on, it doesnt properly produce music, when you turn the gain up enough so that you can hear the sub, it just starts vibrating violently. any ideas what could cause this? I have checked all wiring and different subs etc. Is my amp just screwed?
Any help would be great, thankyou.

[TrikkBen]

Have you checked the sub on another amp?

Ben

[sweefu]

Have you checked the sub on another amp?

Ben

Hi Ben, yup i have had these subs running for months on three different amps, also i have tried the amp on different subs but still the same thing.
Thanks,
Anthony.

[TrikkBen]

May i suggest you check the RCA's make sure there in good nick and plugged in correctly, also go over all the wiring, you might have knocked something out fiddling..

Could also check the amp settings again ie. Input A/AB, Stereo/Mono..

Ben

[sweefu]

May i suggest you check the RCA's make sure there in good nick and plugged in correctly, also go over all the wiring, you might have knocked something out fiddling..

Could also check the amp settings again ie. Input A/AB, Stereo/Mono..

Ben

Thanks Ben,
i've tried four different sets of rca's four different remotes, two power and three earth cables haha. i spend about an hour trying to work out all the settings, no matter what i try i cant get it to work properly, at best i had the sub quietly working as a speaker on Flat setting on the amp, but this really has me stumped.
Thanks,
Anthony.

[TrikkBen]

Maybe the amp has just had it...

Sorry I couldn't help more, Just need one of the Audio nuts to help ya,
I Think Holdenboy is one of these said "audio nuts".

Ben

[sweefu]

Maybe the amp has just had it...

Sorry I couldn't help more, Just need one of the Audio nuts to help ya,
I Think Holdenboy is one of these said "audio nuts".

Ben

Nah no worries mate i appreciate your help, i'm pretty unhappy because i just bought it, secondhand, but still haha. Yeah i'm hoping holdenboy gets home from work soon haha.
Thanks Ben!

[holdenboy]

Sounds to me like the sub is out of phase. Double check the connections.

Amp - Box - Sub.

Just make sure positive on the amp goes to positive on the sub, same with negative.

[sweefu]

Sounds to me like the sub is out of phase. Double check the connections.

Amp - Box - Sub.

Just make sure positive on the amp goes to positive on the sub, same with negative.

Thanks holdenboy, i've double and triple checked on two different subs but still the same result, any other ideas or anything?
Thanks mate,
Anthony.

[TMM]

what happens if you unplug the RCA input to the amp? If it's still going mad without input, the amp is stuffed. If not, try only plugging one input channel in (e.g. just the left, or just the right) if it works like that, you inputs are probably out of phase (i.e. one is wired backwards).

[holdenboy]

Just try swapping around the + and - wires, see if that makes a difference.

I dont think it'll be the RCAs that are out of phase, but it definately sounds like something is out of phase.

[VQXTC]

How many subs are you running?

cheers

Simon

[jokerflingo]

Delete Post Please

[garfa]

hey mate, as with all sysyetms, try external components you know work.
i.e. use a cd player and try that of the amp. Try a different sub. Just keep changing stuff until you can find the culprate.

Also ensure you dont have the x overs set to low pass or something of the sort...

[sweefu]

Hi guys thanks for all of your help, i tried switching the + and - around but still no good, i've hooked up my sub that i use everyday and my mates. i think i've tried pretty much everything haha looks like its gone. does anyone know if audio shops can try to fix amps or anything?
Thanks again,
Anthony.

[HARVZ-6]

almost sounds like mine when the earth came off.. was chasing an earth through the aux's and messing with everything..

deffinatly a good secure earth?

[sweefu]

almost sounds like mine when the earth came off.. was chasing an earth through the aux's and messing with everything..

deffinatly a good secure earth?

yeah mate earth is all sweet, tried in 2 different cars, three different spots and earth cables

[holdenboy]

Generally audio shops dont have techs which test.fix these problems. Maybe a specialist audio store might, but you'll have to check first.

[VQXTC]

I have heard of amps with this sort of problem before turned out to be a problem in the power supply inside the amplifier........

cheers

Simon

[sweefu]

I have heard of amps with this sort of problem before turned out to be a problem in the power supply inside the amplifier........

cheers

Simon

Thanks for that mate, i might call up a specialist audio shop and see if they can have a crack at that.
Cheers,
Anthony.