Affordable and Convenient D-style Tone The Dumble Overdrive Special is the undisputed finest, most sought after, and most expensive model in the world. And with the Synergy OS preamp module, you can insert its bold cleans and overdriven growl into your rig with ease. Best of all, it's astoundingly affordable. On the front of the OS module, you'll find the same controls as the amp that inspired it with clean and overdrive channels. You'll also find the same Rock/Jazz, bright, and Deep switches for fine tuning your sound. Sweetwater guitarists agree, this may be the best way to get D-style tone without selling your home to do it.
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