I need a manual for a rockford fosgate 300x amp

IF you are looking for a schematic diagram on the amp, you wont find it. IF you need the connection information you can look on their site, There is a repair video on that unit attached . Rockford Fosgate Car Stereo Amp Repair

I would use a T500-1bdcp

http://www.rockfordfosgate.com/scripts/rightnow.cfg/php.exe/enduser/fattach_get.php?p_sid=dzxPuerj&p_tbl=9&p_id=285&p_created=1083776610

Follow this link to the downloads page for Rockford Fosgate, you can choose the correct manual there.

LINK

It will NOT work!
You need p/n AP-3212. If you are in USA then contact Rockford for this part number.

replace the inputs on ur amp

Contact Rockford for factory service.

If you don't want to send it to Rockford, ask the local audio shops who they use for amp repairs. If several use the same repair shop, it's probably a good place to send your amp.

If it is the power supply use IRF3205 and change the gate resistors to 47 ohm. Also replace the 4 power supply drivers.

Well firstly are you using a parametric crossover with your radio and how much rca cables do you have coming you head unit (car radio) if you going to bridge the front up with you rear speakers u wont be able 2 hear the rear speakers try hookinking it up 2 your head unit's front speaker output and have ur rca cable connected to your amp running on your rear output of your head unit by doing this you can use your fader on your head unit to control your front and rear speakers

that amp should work fine with those speakers,just make sure that they(speakers)are wired for 2 ohms.at 500-600watts coming from amp, you should be getting 250-300 watts per speaker,just dont crank your gain too high on the amp.