Connecting Sub RCA puts amp in protection mode

[TopDog]

Hi Folks,

Can someone please help.

I recently purchased a HiFonics Zeus 5ch amp zx8000 (yesterday)

Im running a Pioneer DEH-P7600MP HU

When the front and Rear RCA's are connected to the amp all is ok.

Front and rear speakers are working fine.

Here's the problem...

As soon as the Sub RCA's are connected (channel 5) the amp goes into protection mode.

The sub is a Rockford 10" punch is a sealed box - all was ok with my old amp.

Any Ideas? I checked all the leads for shorts and all is ok

When I remove the sub RCA's and reset the amp all is ok again.

Thanks for any help.

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[Slaugh 10+ year member]

you are not removing/inserting the rca cables into the amplifier with it on, are you?

 

[TopDog]

No, the amp goes into protect. I turn everything off - unplug the SUB RCA's turn everything back on and all is fine.

I have tried using different RCA leads and still get the same problem.

 

[beatz06 10+ year member]

I had the same similar problem before and it was because one of my rca's was damaged and i didnt know until i took the silver piece off and saw one of the wires was cut. then it worked fine. then another time i had to replace my gauge wire running from my battery

 

[RandyJ 10+ year member]

Check to see if one of your rca's is damages and shorting out. Try replacing the RCA's and see if the problem is resolved.

 

[Alpineinstaller 10+ year member]

Those 7600s are notorious for bad preouts. Teying another cd player. and see if it works then. I was installing two amps on ones of those HUs same thing happened to me. Mids and highs worked fine. Sub amp wouild go into protect.

 

[TopDog]

Thanks for your help, I'll swap the RCA and let you know what happens

 

[TopDog]

Ok, I just switched RCA cable's with a brand new set. Same thing - I turn on the HU the system makes a thump noise and the amp goes into protect.

Again if I switch off remove the Sub RCA and switch back on the front and rears work fine.

Any more ideas? Thanks.

 

[Alpineinstaller 10+ year member]

speaker wire grounding out. then switch the HU out with another

 

[Alpineinstaller 10+ year member]

check for speaker wires touching together or bare metal

 

[RandyJ 10+ year member]

Ok, I just switched RCA cable's with a brand new set. Same thing - I turn on the HU the system makes a thump noise and the amp goes into protect.
Again if I switch off remove the Sub RCA and switch back on the front and rears work fine.

Any more ideas? Thanks.

Then this reply is probably what you should be focusing on:

Those 7600s are notorious for bad preouts. Teying another cd player. and see if it works then. I was installing two amps on ones of those HUs same thing happened to me. Mids and highs worked fine. Sub amp wouild go into protect.

 

[Alpineinstaller 10+ year member]

thank you n00blet

 

[RandyJ 10+ year member]

Some people just do not know how to pick out certain key points, or they just do not see certain things. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Was there ever any recall for these units? Or anything of the sort that could possibly help this guy get a new unit or his current one fixed?

 

[TopDog]

Cool Mate, Any help is appreciated as this is frustrating - I will test the speaker wires later today for ground shorts.

 

[RandyJ 10+ year member]

If you have a DMM you can use that and not worry about pulling all the wires up for no apperant reason. There was just a thread on it so if you search you should be able to find it. If you cant, let me know and I will find it for you.