Positive Grid's Spark is a breakthrough new way to jam, track, practice, and learn songs. This powerful app-driven smart amp delivers a bedroom-filling 40 watts of over 100,000 classic BIAS amp/pedal/cab presets through its twin 4-inch ported hi-fi speakers, ready for direct injection into your DAW recording session or live PA via USB or 1/8-inch TRS headphone output. And impressive as that is, it's just scratching the surface of all that Spark can do for you. Voice control via the Spark app gives you Slash-worthy lead tones and solo-ready rock and blues backing tracks without lifting a finger. You can even feed Spark your own chord progressions and listen in amazement as a virtual session drummer and bassist accompany you in real time. A massive list of downloadable tone presets and an impressive library of virtual pedals and amps — which are easily navigable by style, artist, or genre — suit this one amp for every electric guitar, acoustic, and bass in your arsenal. And at a mere 11.5 pounds (slightly less than a bowling ball, slightly more than a gallon of paint), the Positive Grid Spark is transportable enough for day-to-day outings.