Setting up monoblocks

First of all, the amps have inputs from the preamp. The outputs go to the speakers, one for the left and one for the right. Each amp will only power one speaker unless they have an A/B switch and then only one channel.

If you are referring to the speaker binding posts and there are four speaker outputs, I believe they are for Bi-amping your main L and R speaker if so appointed. Not front and rear.

If it's a monoblock and not a stereo amp then your setup should be the following:

Preamp to left and right monoblocks to left and right speakers. You'll need additional amplifiers for rear channel speakers.

Dear Eagleflyerfan:

Twenty seconds ago, I was utterly unfamiliar with your amplifier -- and judging from their responses, so are Mssrs. Rmwear, Tom6897, and Mceljo.

However, twenty seconds is all it took for me to go from this AudiogoN page, to Google, and to this picture:
http://www.vintagehifipgh.com/index.php?main_page=popup_image_additional&pID=671&pic=0&products_image_large_additional=images/large/DenonPOA-6600Aa_01_LRG.JPG
for me to become at least familiar enough to answer your question accurately:

Your amps each have a single input. You do have two input connection OPTIONS (single ended or balanced) which is a nice feature.

Your amps each have TWO sets of speaker outputs, and an Output Selector Switch. This allows you to hook up two speakers to each amp; and the Output Selector Switch allows you to play either speaker by itself, or both speakers at the same time.
.

I did take the time to look up a picture of the amps and my assessment is the same.