JBL Launches AI-Powered Practice Amps with Stem Technology

JBL has unveiled a pair of innovative practice amplifiers designed to transform how musicians learn and rehearse. The new BandBox Solo and BandBox Trio represent the company's entry into AI-powered audio equipment, featuring proprietary Stem AI technology that fundamentally changes the practice experience.

These amplifiers allow musicians to stream music via Bluetooth and then intelligently separate or remove specific elements—such as vocals or individual instruments—from the audio. This capability enables players to effectively mute their instrument's part in a recording and practice alongside the remaining band members, creating a personalized jam session experience.

The core innovation in both amplifiers is the onboard Stem AI system. This technology processes audio streams in real-time, identifying and isolating different musical components within a track. For example, a guitarist learning "Stairway to Heaven" could theoretically remove Jimmy Page's guitar part and practice their own interpretation while hearing the rest of the band.

This represents a significant advancement over traditional practice methods, which typically require musicians to find backing tracks or play along with full recordings. The Stem AI functionality works with any music streamed over Bluetooth, giving musicians unprecedented flexibility in their practice sessions.

Key capabilities include:

• Separating vocals from instrumental tracks
• Removing specific instrument parts from recordings
• Processing any Bluetooth audio source in real-time
• Creating custom practice environments for any song

JBL has designed two distinct models to accommodate different musician requirements. The BandBox Solo, priced at $250, targets individual musicians with its compact design and single guitar/mic input. This model is ideal for solo practice sessions and personal learning environments.

The BandBox Trio commands a higher price point at $600, reflecting its enhanced capabilities for band settings. This amplifier supports up to four instrument inputs simultaneously, making it suitable for full band rehearsals or multi-instrumentalists. The Trio also includes several premium features not found on the Solo model.

Additional advantages of the BandBox Trio include:

• Onboard physical controls reducing app dependency
• LCD display for visual feedback and settings
• Replaceable battery system for extended use
• Enhanced connectivity for group performances

The amplifiers integrate with the JBL One app, which unlocks additional functionality beyond the Stem AI technology. Through the application, users can access a comprehensive library of amplifier models spanning both modern and vintage aesthetics, allowing for tonal customization across various musical genres.

The software suite includes an extensive effects collection designed to enhance the practice experience. Musicians can apply phaser, chorus, and reverb effects to their instrument input, along with practical tools like a pitch shifter and tuner. These features transform the practice amps into versatile performance tools.

Notably, the amplifiers will receive a built-in looper functionality through a software update scheduled for October. This feature will allow musicians to layer their playing, creating complex arrangements during practice sessions. The looper represents a significant value addition, arriving after the initial product launch.

Portability was a key consideration in the design, with both models offering substantial battery life for mobile use. The BandBox Solo provides up to six hours of continuous operation on a single charge, while the BandBox Trio extends this to 10 hours of battery life.

The Trio's replaceable battery system offers a unique advantage for extended use. Musicians can purchase an additional battery—though the exact price remains undisclosed—and effectively double their operational time. This feature proves particularly valuable for gigging musicians or those who practice in locations without easy access to power outlets.

Both amplifiers are currently available for pre-order directly through JBL's official website. Shipments to customers and availability through third-party retailers are scheduled to begin on March 1, 2026. This launch timeline gives musicians approximately two months to secure their units before widespread retail distribution begins.

The introduction of Stem AI technology in practice amplifiers marks a notable evolution in musical instrument equipment. By leveraging artificial intelligence to deconstruct audio streams, JBL has created a tool that addresses a fundamental challenge for developing musicians: finding appropriate practice materials that adapt to their skill level and learning goals.

As the October software update approaches, the looper functionality will further enhance these amplifiers' capabilities, potentially making them indispensable tools for both practice and performance. The combination of AI-powered audio separation, comprehensive effects processing, and portable design positions these products at the intersection of technology and musical education.

For musicians seeking innovative practice solutions, the BandBox series represents a significant step forward in making professional-grade tools accessible to individual players and bands alike.