mix speakers?

The New Alpine Amps has those Specs(2-4 Ohm)... The PDX-5, i believe, is an old part #... http://www.alpine-usa.com/product/view/pdx-v9/SpecsM.E.C.P & First-Class

Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!

PDX-V9 and PDX-5 are two different models, yes.Support the12volt.com

The original PDX-5 and all of the PDX multichannel amplifiers are 2 ohm stable. Granted they claim no more power into 2 than 4, they are all capable of driving 2 ohm loads.

I have been trying like crazy to find my original manual and paperwork. I SWEAR it states my amp is usable with 2 or 4 ohm speakers on all channels. That is the reason I bought it...I didn't want to have to go in and replace all the speakers in the car. I believe Alpine has changed the wording since I bought mine two or three years ago.

I can't say enough what a great help you have all been. Thanks again!

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I am so embarrassed...I've only started to look at it. I have two other projects I need to get completed so I have room to work on that one. But I know exactly where I'm going to look from the suggestions here. I too suspect it's the rca's. I will post up the answer once I find it. Problem is, it's not constant. It comes and goes. Seems to happen when you hit a bump. But I'll find it.

Finally an update. First...I found the original data sheet and instructions to my PDX-5. It indeed is fully rated for 2 ohm speakers across the board. Nowhere does it differentiate between subwoofer and other speakers. Which is why I bought it in the first place as the 'Benz uses 2 ohm speakers and I wanted to keep them. Next, what I did was swap the rca's from the head unit into the amp to see if the problem followed to the other speaker. It did. So I knew the problem was before the amp. I pulled the head unit out of the car and totally removed the wires from the connector that are used for powering speakers without an amp. I had them all cut to different lengths and taped off, but you never know. Then I rearranged the wiring behind the head unit. My rca's were already taped. I bolted it back together. It's been several days now and not a peep of noise. Not sure exactly what the problem was, but as long as it's gone, I am one happy camper. Thanks for all the help.

Excellent, glad you got it figured out.  And a lesson for everyone in the importance of a proper installation job!  Support the12volt.com