Here's a good link:
http://www.powerstream.com/Wire_Size.htm Unfortunately none of my amps specify output voltages.
I was going to use the Mesa at 100W / a high estimate of 30VAC RMS = 3.33 amps & lookup in the table. I should use the "Maximum amps for power transmission" instead of "Maximum amps for chassis wiring" right? It comes out to 16-gauge which is what a tube amp repair tech told me today.
I suppose I could have my son play while I hold a meter on the speaker terminals to read the voltages a bit more accurately than using your 30VAC RMS. What do you think about this?
The thing is.. I WON'T be using the switchbox for the Mesa, rather I'll be using the Orange head & the Blackheart. But I think if use 16-ga I should be able to use the switchbox for the Mesa down the road if I ever needed to. 18-ga should be fine too considering the fact that output is very rarely continuous & peaks are transient. Would you agree that 18-ga should work alright?
In a nutshell, when I play the Orange head, it'll run the Orange 1x12 cab & the Blackheart cab too. When I play the Blackheart Combo amp, it'll use its built-in 1x12 & the Orange cab as well. The 4PDT switch simply isolates the heads from each other & I only plan on running one at a time. Additionally, I've learned from Radial Engineering that their Cabbone & Switchbone products buffer & cross-fade (or ramp) the outputs so each tube amp's speaker sees the proper load characteristics during switching. Thus, I will NOT be switching from the Orange to the Blackheart on the fly.
The impedances are ideal for me to run these two 12" speakers simultaneously with each amp at a time though. Since the Orange cab is closed-back with a V30 & the Blackheart combo amp is open-backed with a Celestion Eminence, they should strong & directional, yet with presence when run together.
Tks for your help mate. I'm listening if you have any other comments or recommendations. [
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