I have the j and m 250 watt amp with the rocker series speakers.question is my new head unit requires 4 to 8 ohms can I wire these in series to get the 4 ohms
If your running the J&M amp you don't have to worry about your head units speakers.. The amp is completely capable of driving the two ohm load that is presented to it. The head unit's internal amp will not be in use.