Amp Question

[haydo]

My friend recently wanted to change an amp from one car to other.

It originally had a Sony 222 Watt amp to power a 12" sub. Worked fine.

He tried to put a Jensen 300 Watt amp in but it won't power up. The only difference I can see between the two is the RCA wire's that came with the Jensen have small center wires at each end? Would that make a difference?

I would of thought it would of been a pretty straight forward swap but meh. I don't know much about amps etc.

If you put the Sony back in it works sweet as again.

Can someone enlighten me?

[bbq1988]

remote wire's hooked up? thats usualy what that small wire is for, depending if you use that one or another

[scotty_ish]

Does it power up at all? i.e. are there any lights that come on? usually there will be small LEDs on the side, a green one for power and a red one for protect.
Don't suppose you have model numbers?

[tsoob]

does the new amp actually work? you have checked all the wiring? especially the earth.

[pc]

The only difference I can see between the two is the RCA wire's that came with the Jensen have small center wires at each end? Would that make a difference?

huh? RCAs are RCAs...

got a picture?

[haydo]

He was using the exact same wires from the old amp so would that mean all the wiring is possibly ok?

So that small wire on the RCA is a remote wire? He already has a remote wire connected to the amp so that is not required correct?

Both LED's won't light up. Maybe it is a buggered amp? I will try again tomorrow.

I know the new amp is a Jensen XA2150 amp.

[postfach]

have you checked the fuse on the amp itself (not the one on the power wire)

[haydo]

Fuse seems fine. Worth replacing anyway?

[scotty_ish]

RCA's have nothing to do with remote. Even without RCA's the LED's should light up. If all fuses are fine then it sound's like a dodgy amp to me

[soven]

Check your ground cable. sanded surface etc. otherwise test it by grounding back to battery

[haydo]

Thanks for all your responses.

Will check the ground tomorrow again.

Couldn't I assume all the cables etc are sweet considering we have a different amp using the all exact same cables fine?

Or can different amps be more touchy than others in regards to connections etc?

[haydo]

Must be a buggered amp. Only getting 2V on the remote terminal on the amp when on. Gets 6V on the old amp and 10V on the wire by it's self.

Thanks for your help guys!

[soopachargen]

you shouldnt be getting that much of a voltage drop between the remote wire and the amp... check your termination on the wire, maybe replace it.

[Zyros]

Get a multi-meter on the wires before the new amp is about to be plugged in, make sure you have 12v power on the power wires, if you do and your earth is sweet, it should turn on. otherwise its amp related.

And scotty_ish, some RCA's have a remote wire thing on them now-days, that little wire which travels in between the two RCA leads.

[Alex B]

Thats a good basic test, but for all you know it could be 12V @ 100ma.

[haydo]

Wires are fine nothing out of the ordinary there and they work fine hooked up onto another amp.

Amp must be dead

Cheers guys

[kim0663]

mmmm i say bad connections

[Rumad]

The remote terminal on the amp cud have a dry-joint on it perhaps? that'd be one of the simplest problems i can think of. anything else i tend to agree, if you've re-tried it with the old amp and that works fine must be a more serious amp related problem and you would prolly need to get it looked at...