I installed a Rockford fosgate PBR300X2 amp with polk audio 6.5 inch 4 ohm speakers in my 2012 FLHX. It sounds really good, but after the system is playing for about an hour, it shuts down for a few minutes and then starts up again. I had it velcroed (sp?) to the receiver, then I installed 1/2" spacers thinking that it would help, but it still shuts off. It is not even hot here in PA yet, so it will only get worse as the temp rises. That amp is putting off a lot of heat. I am not overdriving the amp with too much volume. I am assuming that it is the amp since the stock Harley receiver still runs and CDs continue to play although nothing is coming out of the speakers. Has anyone else had this issue and do you have any solutions? Thanks

 

what size wiring are you using?

 

I believe that AMP isn't to be used for 4 ohm speakers. You need a RF 300x4 that is a 4 channel amp and is only for 4 ohms speaker setups.

Let one of the guru's chime in to verify.

 

It's not the speaker set up. That amp is rated at 100watts at 4ohms.

 

I'm running the PBR 300x2 with the polk MM651's. Been over 90 degrees with stereo blasting and haven't had any issues yet. Haven't experienced any overheating problems.

 

That is the same set-up that I am running. As far as the wire guage goes, I dont remember the manufacturer, but it was a amp installation kit. What guage should I be running?

 

Actually the PBR300X2 is rated at 100w rms per channel at 4 ohms.

 

Anyone have more ideas? I hate to send it in for repair if it is something that I can solve myself. I am getting ready to install my LA choppers prime apes, and would like to fix the problem while I have it torn apart.

 

The RF PBR300x2 requires 10 awg power and ground and 25-30 amp fuse. Make sure the ground is solid and bare metal. If you have all the above covered, you may have a bad amp. It will run 4ohm speakers with no problem, in fact it should run a little cooler if anything. Is the amp set to AP or HP and how many bars is AVC set to?

 

I am running 10amp wires. The ground may be suspect as I believe I grounded it up front to an existing ground terminal. I have the amp set to AP and the AVC set to "#2". I just got off the phone with RF tech support and they said the ground needs to be moved to the battery, but that will make it longer than the 30" maximum that the manual specifies. He also said to change the amp setting from AP to HP with the crossover set to around 80 to 100hz. Any feedback on the techs recomendations?