i was thinking of buying a mesa subway cab to use with my r500 head just for something different. The 1x12 cab is rated 400w at 8ohms will that work with the r500 head?
so for my amp to run 500@4ohms, i need cabs running @ 4 ohms. The subways are 8 ohms only! how can i get more power is there a way?
Hi, @RumbleMan3! So, you have a Rumble 500 head and are considering what cab, or cabs, to run with it? Great! You could use EITHER:
- a single 4-ohm cab rated at least 500 watts or more, OR
- a single 8-ohm cab rated at least 350 watts or more, OR
- two 8-ohm cabs together rated at least 250 watts or more, OR
- multiples of higher impedance cabs.
A. a single 4-ohm cab rated at least 500 watts or more, AND/OR
B. two 8-ohm cabs rated at least 350 watts or more, each.
B. two 8-ohm cabs rated at least 350 watts or more, each.
You can run two 8-ohm cabs at the same time, to give your head a total 4-ohm load, to get the full 500 watts from the head. That's right, 8-ohms + 8-ohms = 4-ohms! [But, be careful NOT to run a 4-ohm cab at the same time as a 8-ohm cab because that will give your amp a 2.67-ohm load, which could cause damage!! Yep, 4-ohms + 8-ohms = 2.67-ohms!! Crazy, I know, but that's electricity for you.]
As for speaker sizes, brands, and most other considerations, you may mix and match to suit your own tastes, which may seem like heresy to many others here. But, hey, that's life. For instance, I have, on occasion, run a Bassman 115 neo cab (8-ohm) as an extension to my Rumble 500 combo with two 10" ferrite speakers (totalling 8-ohms) and it sounded wonderful! I even once connected a Peavey 115 cab (8-ohm) to my R500c and it, too, sounded good!! Go figure.



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