Output Power
120W
Product Overview
The Harmonai HJ-803 is a 120W high-power portable Bluetooth speaker with an acoustic configuration of an 8-inch woofer paired with three 2.75-inch tweeters, delivering rich, full bass and crisp, clear highs. It features an integrated 12.8V/6Ah LiFePO4 lithium iron phosphate battery — safe, stable, and long-lasting — enabling reliable, high-fidelity audio performance for outdoor performances, mobile karaoke, and conference amplification. It supports multiple connection methods including Bluetooth/TWS/USB/AUX/OTG/LINE IN, and offers independent multi-channel control to meet diverse audio application needs.
Speaker Drivers
8-inch woofer + three 2.75-inch tweeters
Battery Type
LiFePO4 lithium iron phosphate battery
Battery Capacity
12.8V / 6Ah
Input Options
USB / AUX / OTG / LINE IN / LINE OUT / HEADPHONE / Ch2/3 inputs
Wireless Connectivity
Bluetooth / TWS dual-speaker pairing
Microphone Priority
Supported (automatically lowers music volume to emphasize vocal clarity)
Main Control
Main volume control
Ch1 Control
Music volume / treble / bass
Ch2 Control
Microphone volume / wireless mic volume / mic treble / bass / reverb / echo
Ch3 Control
Instrument volume / treble / midrange / bass / reverb / delay
Recommended Use Cases
The Harmonai HJ-803 excels across multiple audio scenarios: Outdoor performances and street shows — 120W output combined with portable battery power delivers high-fidelity sound anywhere; Conference presentations and training — microphone priority ensures clear, intelligible speech; Mobile karaoke and parties — TWS dual-speaker pairing creates immersive stereo surround sound, while reverb and echo effects enhance vocal performance; Instrument accompaniment and rehearsal — the dedicated Ch3 instrument channel offers independent EQ and effects (reverb/delay), supporting direct guitar or other instrument input for expressive live play.
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