KABT-250 Audio Amplifier Board 2 x 50W Bridgeable Bluetooth 5.0, TWS, DSP

Unleash 100 Watts of Wireless Power

True Wireless Stereo (TWS) & Multi-Speaker Sync

Cut the cords and enjoy truly wireless audio with TWS support. Thanks to the BTM983H Bluetooth chip the KABT-250 can pair with a second unit to create a left-right stereo setup or connect to up to 256 amplifiers in Party Mode, syncing audio across an entire event space. When syncing multiple boards, the master board pairs with your Bluetooth device and the other boards will be in slave mode to the master board. Slave boards will have about 30 foot range from the master boards with the external antenna attached to all boards. No speaker wires needed—just power each unit separately and enjoy a seamless wireless audio network.

DSP Customization for Ultimate Control

The BTM983H chip also has built-in digital signal processing (DSP) that unlocks precise audio tuning, including custom EQs, crossover adjustments, bass boosts, and noise suppression. Program your sound profile with the Dayton Audio KPX (sold separately) and free Dayton Audio KABX software, ensuring every speaker sounds exactly how you want it. Whether you’re fine-tuning a subwoofer crossover or optimizing vocals for audiophile-grade clarity, the KABT-250 puts sound shaping at your fingertips.

Multiple Input & Output Options

The KABT-250 gives you flexibility with Bluetooth 5.0 streaming, a built-in 3.5mm AUX jack, and an optional external 3.5mm wiring harness. Even in TWS mode, you can wirelessly transmit an analog signal like a record player, TV, or computer to paired units, making it easy to distribute audio across multiple amplifiers. For output, it supports speakers as low as 2Ω in mono mode and 4Ω in stereo, making it compatible with a wide range of speaker designs.

Portable, Battery-Ready & Easy to Integrate

Designed for DIY speaker builders and portable audio enthusiasts, the KABT-250 works with 12-24V DC power adapters and battery boards like the Dayton Audio LBB-3v2. With solder-free wiring harnesses, it's easy to set up, modify, and integrate into your custom speaker enclosures. Whether you’re creating a Bluetooth boombox, bookshelf speakers, or a wireless subwoofer, this amplifier delivers big sound in a compact package.

Plug-n-Play Quick Installation

The KABT-250 is still plug-n-play like all other KAB style boards and has the same footprint. This insures quick installation for all the function cables into your small or medium size DIY audio projects. The board includes the power input cable, speaker wiring harness, Bluetooth pairing button and external antenna. We have a specific function kit KABT-SFC (sold separately) that increases functionality, if needed, to finish your project.

Endless Applications

Due to the overall audio performance and built-in Bluetooth with DSP Programing option and multi-board pairing option, this amp board has almost endless application possibilities. From hobbyists and DIYers to manufacturers and installation organizations this Bluetooth amp board has immense flexibility. Even if you bypass the Bluetooth feature, this amplifier board integrates easily into any job because of its array of included and optional wiring harnesses. Examples of applications include:

Bluetooth and Multiple Board Pairing Instructions

Standard Pairing - With the board powered on the Blue light flashes searching for you Bluetooth device. Make sure your Bluetooth device is in search mode and select DAKABT when it shows up. The Blue light stops flashing when paired to your Bluetooth device. If the board flashes Blue and Yellow hold the pairing button down until it flashes just Blue. Repeat the above directions.

Multipoint and TWS Pairing – While paired with your Bluetooth device press the pairing button quickly two times on the Master board. One LED will be blue and the other LED flashes yellow. Press the Slave boards pairing button quickly one time and the Slave LED will turn solid yellow. Follow the same procedure if you want to add another Slave board. When the boards are unplugged, you must press the pairing button one time on the Master board to pair with the slave when power is restored. All Slave boards must be within 30 ft. of the Master board. If the Slave board's yellow LED flashes that means it's not paired with the Master board and must get closer to the Master board.