Best place to start is the manual -- they actually mention this arrangement (which I also considered at one time). It's page 23 of the PDF file, in the section on Setup and Configuration (third page of that section), bottom half of the left column. Outlaw recommends a parallel arrangement, and note that this arrangement will require you to switch the impedance selector to 4 ohm (switching it while the 1050 is turned off). They also detail both ways to arrange the wiring itself to achieve parallel wiring.

Whoever wrote the manual for the 1050, let me just say thanks while I'm thinking of it -- it's a nice piece of work. I keep the Acrobat file on my computer (me fiancee finds it amusing that I don't dig out the printed copy, but it's in a filing cabinet with a couple dozen other manuals).