As outlined here, alternative to axe-fx I picked up a spiderII 150h head and a peavy XXL 4x12 cab for dirt off craigslist to hold me over until I can afford/find better gear.
both items are crap. I know this.
But, i'd like to get the best out of it while I have it running. Playing with a dummer the other day, I found that about 1/2 volume is as high as it will go. Beyond 12 o'clock to 6, it doesn't get any louder at all.
The 150h is set up for 2 cabs, 8 ohms each, in stereo (l/r channels, not 'top/bottom'), effectively 75x2
The xxl cab is wired for 16 ohms, mono (1 jack)
From my car audio days, I realize this means that I'm using the left (or right, whatever i'm plugged into) 75 bank at effectively 1/2 draw, or 37.5 watts. And that explains why a dummer in a basement is basically drowning me out at full volume.
I likely will never have/use a full stack with this head (or this cab) so sending both amp outputs to 1 cab seems to be the smartest/cheapest thing to do.
The cab is rated for 300 watts, so i'm thinking about making it stereo, get a new back plate, re-write the inside to 2 banks, 8 ohms each.
Can I do this?
The specs don't list what the speakers are each ohm wise. All i can find is "4 - 12" model 144 Blue Marvel speakers" but no more details about those individual speakers themselves. The XXL isn't even listed on here: Peavey.com so i'm out of ideas.
If they are 8 ohm speakers, I can do series-parallel, giving me an 8 ohm load on 2 speakers.
If they are 16 ohm speakers, I can series them to get 8 ohms per side.
This will effectively quadrouple my output if I am doing the math right. This will give me a full 8 ohm draw, and be able to get both sides running at 75 each, for 150 solid state line 6 wattage of DOOM!
Sound right? Anyone have any pointers for doing something like this? Or should I just scrap it and get a real cab?
Get a multimeter, They're invaluable for doing all sorts of work like that. Measure the speakers, and see what comes up. I'm fairly sure the Blue Marvels exist in both 8 and 16-ohm models. Wiring a cab stereo is fairly easy, too. At least if you have a fundamental knowledge of how Series and Parallel circuits work...