94 Pathfinder stereo is dead

Im missing an amp in what im assuming was a factory premium sound system. Does anyone know where i could get another amp or how to bypass the amp and hopefully get the stereo up and running?
thanks

I'm thoroughly lost

Try to give more details.

When you say you're "missing an amp", what exactly does that mean? Did you buy this car used, and not realize it didn't have an amp? Or was it stolen?

Are you the original owner?

Have you performed any work on the radio or its accessories? If so, detail those modifications.

Whatever the case, to bypass an amp, remove the RCA-out preamp plugs from the radio, disconnect any remote power turn-on, and re-wire the speaker wires to the radio.

Or just replace the "missing" amp?

I'm trying to visualize this and I see a pair of RCA plugs, a couple of 4-gauge wires and a blue relay out and pairs of speaker wires dangling in the rear around an area that has 4 screw holes and a dust ring..