JamStack is a portable guitar amplifier that snaps onto a strap peg and makes use of a connected smartphone into variety of app-based digital effects. A basic prototype is a speaker and smartphone mount that could be attached and detached from pretty much any guitar.
The portable speaker is popped onto a guitar’s strap button, with polymer padding on all contact surfaces helping to protect the host instrument from scratches. A fold-out stand sports its own strap button and serves to keep the device in place, and allows it to be used as a standalone smartphone music speaker.
It features two built-in speakers powered by a 10 W amp. An integrated battery is good for up to 8 hours of continuous play. It also includes a volume knob and a headphone jack for private sessions. An instrument cable runs from the guitar’s output jack to the amp and another audio cable connects the unit to the docked smartphone. The signal path runs from the guitar to smartphone and then to JamStack. The crowdfunding video below shows the working prototype in action.