positive grid spark guitar amplifier, electric, bass and acoustic guitar combo amp bundle (spark) positive grid join over 100,000 spark players around the world and get ready to practice, jam and record at home like never before. a powerhouse 40 watt combo, spark is a smart amp and app that jams along with you using intelligent technology, with backing tracks available for any style you play. import your favorite songs from spotify, apple music or youtube and spark will display their chords in real time with its auto chord technology, enabling you to learn songs in an instant. spark also analyzes your style and feel with smart jam technology, generating authentic bass and drums to accompany you - it’s your own virtual backing band! plus, you can build your own tones using 30 amps and 40 effects, with access to over 10,000 more presets created by spark users, artists and producers on the ever-growing positive grid tonecloud. spark's deep, loud and immersive speaker design delivers versatile tones for guitar, bass or acoustic. plug and play right out of the box with the onboard amp selector, tone stack, modulation, delay, and reverb effect controls, and more. then connect to the free accompanying spark app to explore a world of tone customization and voice command-enabled features.