Dunlavy 4 or 8 ohms for Audio Research VT-100 amp?

I have Dunlavy III speakers, I want to connect the Dunlavy III speakers an Audio Research VT-100 amp but I don't know whether to connect to the 4 ohms or 8 ohms on the back of the amp?

I don't have the book for the Dunlavy so does anyone know whether I should hook it up to the 4 or the 8 ohms? Does it matter? Thanks for your help everyone!

Andy
andy2gold@comcast.net