Most people overlook the jazz switch on a Dumble Overdrive Special style guitar amp, but there are some really cool tones to be had. It really works well with a stratocaster to get some of the more classic strat tones that we know and love.
I have also experimented with the jazz switch with humbuckers, and while there are some fantastic tones to be had, rock mode with humbuckers is really where the “Dumble sound” lives.
At gig volume the overdrive channel has some pretty serious treble in jazz mode, so depending on what volume I’m playing, these tones may or may not be achievable depending on how you set the tone controls.