JamStack is the world’s first attachable guitar amplifier
The JamStack attaches to the base of any “standard” electric guitar and integrates with an included smartphone app.

The JamStack attaches to the base of any “standard” electric guitar and integrates with an included smartphone app.
The QH4 is a simple device that has one function, headphone amplification and it performs that function exactly as it should.
Amp features top quality stereo sound, 4.0 Bluetooth connectivity, and 7-hour battery life.