I have a bass guitar cabinet with two K140's in parallel. The drivers are rated 8 ohms, but my Fluke meter shows 2.9 ohms when I measure the resistance.
I recognize that resistance and impedance aren't necessarily the same but it's got me wondering......I'm using a Fender Rumble 150 head designed for a 4 ohm speaker load. Right now, I'm mating the amp and cabinet with a Weber Z-Matcher, with the input side for the amp set to 4 ohms, and the output side for the cabinet set to 2.6 ohms. i don't hear any difference regardless of whether the cabinet is switched to a different impedance.
Is the Z-Matcher doing anything productive by being inline, or would it work just as well connecting head directly to cabinet?