You will need to use jumpers (see following link for pics) or use bi-wire speaker cables.
Another option would be to open them up and "jump" the wiring internally.
DeKay
Celestion SL600 Expertise Needed
I recently inherited a pair of these speakers and I want to hook them up to my Crayon integrated amp. The back of each speakers has four round female connections. Two red and two black.
Can someone guide me as to the correct connection method? Further, will I need a jumper for each speaker?
Way back in the day I actually owned a pair of these. So I am interested how they will sound with more modern equipment.
Thank you in advance.