Hi! I've a JCM 800 + cabinet Marshall 4x12 speakers celestion of 15 Ohm. The speakers are connected in serial-parallel resulting in an overall impedence of 15 Ohm. I just bought a Two notes captor X - 8 ohm version (in fact I can select 4 or 8 or 16 ohm). My question is: can I connect the output of the Captor X in the cabinet with 15 ohm or it is necessary to reweire the speacker in order to obtain an impedence of 8 ohm. In this case, it is possible to obtain 8 ohm using all the 4 speakers or it is necessary to use only 2 speakers in parallel (1/((1/15)+(1/15))=7.5 ohm. Thank you!