Ok You have a 4 channel amp. Those Bridged switches efectively take two of the channels and combine them into 1 amp. So your amp could be run as a 4 channel amp, 3 channels, or 2 channels.

Since you are going to be running 4 speakers you would have 1 speaker per channel of the amp. Like others have said you need a Y cables for your RCA's to drive all four channels on the amp.

Now this is something to consider. You have 200 watt speakers being run by a 65 watt amp. You are way under powered for the speakers. Now I don't know what kind of speakers you have, and some brands really overstate what the power handling of the speakers are. They may be 200 watt RMS JL's and you have way to little power for them. You may have 200 watt Peak power speakers from Pyle and 65 is probably plenty for them.

Anyway if they are really a 200 watt RMS speaker you need more power. Yes the amp you have will play them, but you wont get any where near full potential of the speakers. You also really stress the amp you have making it run hard to get sound. Speakers will last a long time with more power, to little power will kill a speaker fast. What happens is that with too small an amplifier you drive it into distortion or clipping. When that happens all the amplifier does is send the cliped signal as HEAT to the voice coil of the speaker. As such it burns of the voice coil. You can run a 100 watt speaker all day long with 150 watts of clean power and never have an issue. You can run a 100 watt speaker with 10 watts of clipped power and it will smoke the speaker quickly.

This response is totally wrong. Sorry nightlife - you are way way wrong. Been in the business 34 years are speaker ratings mean zero, zip, nada. Too much to write, but u may want to google some info.