Hey all, thought I'd share my simple Rumble mod. I've been using the 500 combo for a few years now, sometimes alone and sometimes with the 2x10 extension cab depending on the gig. It's served me well and was a worthy replacement to more expensive and much heavier 4x10 and 2x12 cabs. Recently though I started experiencing the problem noted here, and it got progressively worse:
New Fender Rumble 500 Combo Crapping Out?
Since I'm out of warranty, I thought about what I could do instead of spending time and $$$ trying to get it fixed with no guarantees the problem would be solved. After some thought, I decided to dive into some of my previous gear and turn this rig into two 8 ohm, 500w 2x10 cabs. Sorry in advance for lack of work/progress pictures, I didn't really think I would share any of this until after the fact.
So, I simply removed the amp and wired the speakers to a speakon input jack ('Hosa NL4MPR Neutrik Connector, 4-pole speakON' from Amazon), drilled a hole and mounted it right where the wires originally came out to the amp. I bypassed the tweeter since I never use it and also because I am a total amateur at this stuff and wanted to keep it simple.
I also swapped out the speakers in both cabs with the 10s from my Genz Uber 410 4 ohm cab. I THINK they are Eminence deltalites?, and boy do they sound amazing. I understand speakers are tuned to particular cabs but this is a match made in heaven, and reduced the already light weight of these cabs even more, a blessing for my aging body and bad back. I tidied things up with replacement Fender badges (blackface logo, also from Amazon), hooked them up to my Shuttle 900 and now have a not quite mini but super light, modular rig of doom!
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