I just picked up a beomaster 1900 and beogram 3400 from a friend. i've got the two connected but am at a loss as to how to connect speakers to the beomaster 1900. any ideas? i've never seen speaker ports like this before.

You will need a couple of 2 pin DIN loudspeaker plugs.

type speaker din into ebay there are plenty of options including pre-wired or screw terminal etc.

If in US here last item on page

Image here

Both screw-mount and solder types are available.
Check Ebay (or ask me).

Impressive how many people never saw DIN speaker sockets before.
It's the only worldwide standardized socket/plug type for home audio speakers for 50 years.
Everything else is non-standard, proprietary or homemade.

Martin

Its amazing to see, specially in new equipment, how bad connecters they have, screw naked cable directly, banana, cheap RCA, good plugs like the DIN line is only for computers, and after selling you an expensive reciever/amp with crap connections, they want you to buy "audiophile" cables for the same price as the reciever/amp

And on Ebay US they charge up to 10.00 US for one 2 pin DIN, description: special B&O vintage speaker plug, they also sell some cheap China made screw mount where the screws pops out the first time you connect a cable to them.