Check the listing for details. JBL BandBox Trio AIPowered Practice Amp and Speaker Black. Condition: New. Listed at 599.99 USD. Practicing alone no longer has to feel like practicing alone, and the JBL BandBox Trio transforms solo sessions into full-band experiences with intelligent, performance-ready design. This all-in-one, AI-powered practice amp and speaker uses real-time Stem AI to separate vocals, drums and instruments from any streamed track, letting you mute parts, isolate solos or shift keys instantly. With 135W of JBL sound from a multi-driver speaker system, built-in guitar amp models and effects, and a four-channel mixer for mics and instruments, BandBox Trio is built to practice smarter and jam harder. Add onboard practice tools, USB recording, app-based control and up to 10 hours of battery-powered playtime, and you’ve got a portable creative hub that’s ready wherever inspiration strikes.