Прочие устройства — JBL BandBox Trio

The BandBox Trio is the larger of the two AI-powered practice amp and speaker units in the JBL BandBox range from HARMAN International, sitting above the compact BandBox Solo. It packs a four-channel mixer, a guitar amp with effects, a Bluetooth speaker and a USB recording interface in one cabinet that runs from the mains or from a swappable battery.

Key specs that matter

Class D amplification rated at 135 W RMS to IEC 60268 drives one 165 mm woofer and two 25 mm silk dome tweeters. JBL quotes 50 Hz to 20 kHz at -6 dB, with noise sitting more than 80 dB below the signal. The 68 Wh lithium-ion pack (7.2 V, 9,444 mAh) lasts up to 10 hours of music. The enclosure is 344 x 265 x 228 mm and the net weight is 6.65 kg.

Engineering and use context

Channels 1 and 2 use 6.35 mm XLR/TRS combo jacks - the first switches to a Hi-Z guitar input, the second takes a microphone or a line-level instrument such as a digital drum kit. Channel 3 is a dedicated Hi-Z guitar jack, and channel 4 combines Bluetooth, a 3.5 mm AUX jack and USB-C, with priority in that order. Input sensitivity is 20 mV rms for microphones, 100 mV rms for guitar and 370 mV rms for line and AUX. Outputs include a 3.5 mm headphone jack of 1 Vrms for 16 or 32 ohm headphones, a 6.35 mm TS PASSTHRU for a mixer, PA or JBL PartyBox, and a 2-channel line out of 1 Vrms. Over USB-C the Trio acts as a UAC recording interface, accepts 60 W PD charging at 5, 12, 15 or 20 V, and can also charge a phone at 5 V and 3 A. Mains input covers 100 to 240 V at 50 or 60 Hz. The battery is a user-replaceable JBL BATTERY 400. Stem AI splits streamed music into separate stems with 2 seconds of latency, while a karaoke mode with pitch shift runs at 500 milliseconds. Built-in tools add a tuner with manual, auto and chromatic modes, a metronome, a drum machine and a 60-second looper that can record over a drum track. Bluetooth 5.4 carries A2DP 1.4 and AVRCP 1.6.3 with two-device multi-point, and the unit falls into standby after 20 idle minutes.

Pairing

A guitarist, a singer and a keyboard or e-drum player can all plug in at once, with backing tracks from a phone on the fourth channel. For bigger rooms the PASSTHRU output feeds a PA, and the USB-C link sends a multi-input mix to a DAW on a computer, tablet or compatible phone.

Alternatives

For solo practice, JBL makes the BandBox Solo, an 18 W RMS model with one instrument jack weighing 0.53 kg.