I have 2 kicker cvr12s and a legacy predator 2400 watt amp and when I turn the radio up the amp goes into protection once they hit a decent time. I just down graded from 15s so I know its not a power problem and I have a 200 amp fuse

Power up the ampwith no speaker connected. If it goes into protect mode, the amp has been damaged.
If it is OK, check your user manual for wiring instructions, loading etc.
Do not allow the speaker wires to touch the car chassis/metalwork!

Most likely cause is heat. The clearances behind the radio are often not sufficient to provde the proper air coolling that the higher power radios need. The heat sinks on the rear of the radio require a certain amount of air flow to dissipate the heat generated under high load conditions. If you add summer heat to the equation, you can have the radio going into thermal cutout to protect it circuity.

If you have checked your ground, live, remote and RCA's, The problem may lie with your kicker speakers.
There may be a loose wire connection on the speaker terminals (hense no sound).
Check the terminals at the speaker (+) and (-) then check the speaker wires to your amp inputs.
Usually if there is a fault with any wires linked to your amp, the amp goes into protect mode.
If your amp is not going into protect mode, try linking a different speaker to each terminal on your amp (left) then (right). If you get sound through a different speaker, more than likey your speaker wire to your kickers has came loose (due to vibrations) or there is a break in your speaker wire.

Hope this helps. If any more info is needed I'd be happy to help more. Please rate if helpful

try hooking up only the power ground and remote see what happens if protection light is on then u have a problem with amp if it goes off then hook up rca if still off then hook up speaker wire if it turns on then u have a prob with speakers

Try any decent amp that runs 800-1000 watts RMS/continuous at 4ohms. Hifonics, Kicker, PPI, MTX etc. You should expect to pay $500+ for a decent amp. You get what you pay for.

make sure the impedance is right for the amp you're using. If you're using a 4ohm amp and a 2ohm sud that may be the problem. It may be overdriving the amplifer which is bad and can cause damage to the amp. Hope this helps.

i would suggest a pro persicion amp 2400 watts thats what i run and its very decent

The amp, i am not so familiar with, so do your homework...

You want to pay attention to sound quality specs such as signal to noise ratio (the higher the better, like around 100 ) and THD (total harmonic distortion, the lower the better, like between .1% and .001%) If your amp is putting out 2000 watts at a high distortion level such as 1%, you wont be too happy with the quality and you may blow your sub before ever approaching the full 2000 watts.

As fara as your car goes, a heavy duty capacitor would well placed between the battery and the amp, and upgrading the alternator may be considered. If not, you are looking at substantially shortening the life of both your battery and present alternator.

Disconnect all speaker wires from the amplifier's speaker terminals and disconnect the RCA cables from the amp. If the amp still goes into protect, it probably has shorted output transistors.

Disconnect the speaker wires from the amplifier and see if it still goes into protection mode. If it still goes into protect with the speakers disconnected, there's a problem with the amp; if not, you may have a blown speaker or a shorted speaker wire.