Help With Identifying Jensen Speakrs In Quadbox!!! Please!

[kapitalpunk]

hey all....

i picked up what i thought was a bargain at a local sale but they have me confused... the quadbox is 4 x 'jensen concert musical intrsument' speakers and have numbers on the rims but i cant seem to find a PM15 or any id like ones ive seen on websites....
they are approx 15" speakers and im eager to test them out! i just need to know what amp i can hook them up to!

thanks heaps

 

[Clive Hugh]

Jensen speakers are still being made, they would be a good place to start