The Dumble Overdrive Special has been one of the "Holy Grail" guitar amps for many years. So what are the chances of you getting your paws on one? It is thought that there may only be around 300 original Dumble amplifers in existance with the asking price now from $20,000 - $50,000! That's probably not an option for most of us, so what can we do for that Dumble tone? Well, we'll make our own won't we :-)
Here's a great clip of an original Dumble Overdrive Special in action:
There are quite a few kits out and about these days, one of the most widely known and reviewed as "the best" is the Ceriatone Overtone Special which can be found here: http://www.ceriatone.com/productSubPages/OTS%20Series/OTSMain.htm
Here's a layout for the Overtone Special 50 (A Dumble Overdrive Special 50W Clone):
The Kits at Ceriatone are fairly well priced. Obviously if you can find your own suitable donor chasis you'll cheapen up the build considerably!
Here's a demo video of the Ceriatone Overtone Special in action:
They do sound pretty sweet, really smooth and break up so nicely with single coil pickups. If I had the cash I think I'd be going for a DIY Dumble build asap!
There are a great set of instruction videos on youtube created by Tony McKenzie which document his building of a Ceriatone Overtone HRM kit, here they are for you:
He's also reviewed the amp too, check out his site here: http://www.tonymckenzie.com/ceriatone_hrm_review.htm