Hey guys,
I just found out that my old marshall amp is a JMP 2104 2x12" combo from about 1980. Cool surprise!
But anyway, One of my speakers has teared, and needs to be replaced. The speakers are Celestion G12-65 - 15(!!!) ohms. I have never heard of 15 ohms speakers, neither has the guys in my local music shop.

Sooo, basically, I'm wondering if these speakers can be replaced, and / or the amp has to be modded in order to run through another impedance..

Thanks in advance,