8 ohm sub w 4 ohm amp?

RMS Power Output:

This is the specs on the amp.  How could I wire it bridged to get the most out of the amp.

again..bear with me.  I'm learning because of nice people like you!  and I'm not just typing post after post:  I am going thru searches finding info on these topics.

Thanks, Justin

If you bridge this amp into your single 8-ohm speaker, it would produce about 200 Watts.  If you add a second 8-ohm speaker, each speaker would use about 200 watts (the amp would operate at the 4-ohm rating.)

If I were you, I'd go ahead and install the system, using your single speaker connected to the amp in bridged mode.  Run the same input to both channels (the RCA level signal from your head unit) and see what it sounds like.  This speaker might just be fine for you with this amp.  The only way to get "more" would be to upgrade to a larger amp (if your sub can handle more than 200 watts) get a different sub, or add a second equal sub.

The problem here is your sub, your amp is designed for maximum output into a 4 ohm load when it is bridged. Here is some basic math for you to help understand

8 ohm sub on a bridged mono amp that produces 400w rms @ 4 ohms, you get 200w

4 ohm sub on a bridged mono amp that produces 400w rms @ 4 ohms, you get 400w

2 ohm sub on a bridged mono amp that produces 400w rms @ 4 ohms, you get 800w

Your amp is not capbale of 2 ohm mono, so disregard it, it is there to show you how ohms relate to power output. Your sub, the Rockford 8 ohm that you have is the first example, thus it is not a good match to the amp. To get the most from the amp, you connect the + speaker lead from the sub to the + bridged output on the amp, then do the same for the negative speaker lead. Usually the amp has markings on it to show the bridged terminals, does your amp have these markings? And are you going to return the sub for a 4 ohm version? this would be your best bet.