One channel on my fosgate amp burned out how do i fix it

Yes. Wire the two 2 Ohm speakers in series and connect them to one channel. Connect the 4 Ohm speaker into the other channel. This will give you a balanced 4 Ohm load on each channel.

Question: what starts to smoke, the speaker or the amp? I'm assuming it's the amp. It cant be a fuse because that's what fuses are for to cut the power on an overload or surge. I would have a look at you circuit board for the amp My guess is what you;ll find is a burnt spot on the board and that will tell you what component is bad and needs replacing. Good Luck

how did you wire it?

Hello
Rockford Fosgate P500-2 is capable of delivering 125Watts to 2 channels @ of 4 Ohms speakers, and 250Watts to 2 channels @ of 2 Ohms speakers.

Short inside one of the transistors. This requires very good soldring skills and electrical know-how, and some thermal paste to go between the heat-sink and the transistor. Unfortunatly this is not a cheap repair, probably cost around 100 dollars.

Cheers,

Kevin

Hey i have looked over many rockford manuals,(i own a 300.1 my buddy owns a 325.1) and for there mono(.1) amps there hooked together on the inside so channel A+ and B + are cencted on the inside the amp. So you ither hook one 2ohm sub to channel A or you can hook 1 4ohm subs to channel A and 1 4ohm sub to channel B. There 2ohm stable so any lower will eventualy burn the amp out.

If you didn't find any burned parts that would mean one of the buffer amplifiers before the power amp could have died. They could either be transistor based or opamp based. They are fairly low power so they will not explode like the output transistors like to do. Contact rockford, they should be able to send you a schematic. Let me know I will try to help you through it.

better to just get a new amp if they don't fix it right you can end up with burned up speakers

your battery might need to be replaced because it will no longer hold charge long enough for amp to power up completely

schematic is not totally necessary; the two channels are identical with the same topology, just most to comparate it for burned devices.
Example: two NPN transistors for CH1, two for CH2

one npn driver for CH1, the same for CH2