Originally Posted by grant04nav
To start out I have a Sony head unit and a Rockford Fosgate punch 125.2 amp with 2 8" subs. Over the past year or so, during long drives the subs will quit for 5-30 min. Recently they would work for up to 2 minutes after starting and turn off until I restarted the car. Now they don't turn on at all and the radio won't find any station. CD player and auxiliary cord works along with door and back seat factory speakers. With car on I see a red bulb on the amp that I assume is a power light but it is also not on. Swapped out outside car antenna and looked at fuses on driver side. Anyone have any input? Cause my speakers don't.
I will assume the head unit is powering the main speakers and the amp is powering the 2-8" subs.
Being a 2 channel amp, I will guess it's wired 1 sub per channel?
I have owned many RF amp's in the past and they are pretty much bullet proof if treated right. Amp's have a remote turn on input that connect to the head units "remote turn-on lead" (wire). This wire is blue or blue/white stripe. This wire also has to be connected correctly. If this wire is losing connection and connecting for some reason the amp will act like it is now, going on and off.
Yes, the red LED is a power "on" light.
Sounds like the amp is loosing power, OR, going into "protect" mode. Protect mode meaning:
1) it's seeing too low of an impedance (resistance, ohms) load, being an RF amp, this is unlikely.
2) amp is getting too hot. Again, probably not, RF amp's produce a lot of heat (not very efficient), but I have never had an RF amp shut down from heat.
3) speaker or power short. This "could" be the issue. Speaker wires shorting or power wires shorting. This will cause the amp to go into protect mode, but, there should be another LED indicator for this. The RED power LED shouldn't go out. The amp would just go into protect mode and light up a different color LED ( yellow?).
As for the radio station tuning / antenna issue. When you replaced the antenna, did you connect it correctly? A stereo having issues finding station is an antenna problem. Or maybe the antenna isn't good enough (short stubby).
Go through and check all connections to make sure they are connected correctly.
If you can't figure this out on your own and live in the USA, you can call me and I will assist you with this. I won't be able to do this til Saturday though. If you want to call me, PM me and I will will PM you my number. My number is also listed on my website. I am a Vendor on here "ercsaudio.com" .. Which is short for Eric's Car Audio.
I will assist you in any way I can. Just let me know.
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