How can I tell what the resistance should be, that device that Tim posted , will that tell me the correct resistance? If I measure the other crossover that I haven't changed any electrolytic caps out of yet.This one cost more, but easy to read:
If I find out the correct resistance can I change the resistors to the correct values.
I want to keep the jantzen caps but I don't want to alter the intended resistance, can I accomplish this by swapping resistors with an higher resistance?
https://www.amazon.com/Peak-166225-Atlas-ESR70/dp/B005NIBEYU/ref=sr_1_1?s=industrial&ie=UTF8&...
Yes, you can swapping those resistor to fine tune or simply add a resistor in series to the new caps to make the ESR same as the existing caps.

