Is this the type of connector you are looking at?
Male 2 Pin DIN connectors Plugs. Simply strip wires, and screw into place. 10 x 2 Pin Plugs. neutral or. Weight: Approx 5g / Each one. We will provide you service as best as we can, because the.
www.ebay.com
If so, I found these on Google in about thirty seconds. If not... I'm at a loss.
I did another search on Google for Philips B&O Speaker Connector, and it really does look like this is exactly what we are seeing on the back of the amplifier, so it should be easy enough to pick up some of those adapters off of eBay (or whatever) and connect them to normal speakers as desired. It does look like the screw down terminals on the back of the adapters aren't all that large, so you may be limited to 16 gauge speaker cable or so. Just something to be aware of.