Included with the KABD-250 are three wire harnesses: one for DC power, Bluetooth reset button, and the other for connecting to stereo speakers. For many users, these cables are all that is needed to complete a project. Since they have additional on board connectors, wiring harnesses (sold separately) are available to speed-up installation and create confident connections without soldering. Dayton Audio also offers a variety of accessories with robust features to make installation even easier. Find out more about optional accessories below.

Endless Applications

Use this full function, adjustable amplifier board with built-in DSP chip and Bluetooth5.0 in endless wireless audio applications that seem impossible to produce the right sound quality. So if you’re a hobbyist or manufacturer enjoy presetting this full functioning 2 x 50W DSP amplifier board to peak performance in your finished product. The KABD-250 is also CE and FCC ready for certification purposes.

To add more channels to your project use the line output socket with another amp board using wiring kit KABD-SPF (sold separately). Examples of applications include:

Portable Power Paths

For portable applications, there are three battery holder/charging boards which permit the connection of li-Ion rechargeable batteries to power the board. First is the Dayton Audio LBB-3v2 3-cell 18650 battery holder/charger board that is the same size as the KABD-250 which makes it easy to stack the boards with standoffs. This battery board must use a 5 to 24 VDC power supply.

If you desire more wattage output, use the 5-cell 21 VDC Dayton Audio LBB-5Sv2 or LBB-5v2 board. They work with 5 to 24 VDC power supplies. The LBB-5S uses 18650 Li-Ion batteries, and the LBB-5 uses 26650 Li-Ion batteries which delivers more play time. These portable power sources are highly recommended since all three provide under/over voltage protection.

Please note: To achieve power output briefly plug in the recommended power supply into the battery boards after the batteries are installed or when the batteries are removed and reinstalled.

Package Includes

• One Dayton Audio KABD-250 DSP Amplifier Board
• One 2-conductor power cable 20"
• One 4-conductor speaker cable 20"
  
• One Bluetooth reset push button with cable 20"
  

Specifications:

• Power output (w/ 24 VDC power supply): 2 x 50W @ 4 ohms
• SNR: 88 dB 2 x 50W @ 4 ohm, THD+N=1%, 26 dB, A-weighting
• 2 x 50W @ 4 ohm, THD+N = 1%, 200 Hz
  
• THD+N: 0.06% 10W @ 4 ohm 1 kHz 24 dB
  
• Frequency response: 20 to 20,000 Hz (±3 dB)
  
• Impedance: 4-8 ohms
  
• Recommended power supply: 12 to 24 VDC, 4A
  
• Board mounting holes center to center spacing: 3.32" x 2.4" (84 x 61 mm)
  
• Hole diameter: 0.14" (3.5 mm)
  
• Dimensions: 3.6" L x 2.7" W x 0.9" H

OPTIONAL ACCESSORIES

• The 6-wire 6-pin AUX line output cable enables you to add up to two more channels for 2.1 or 4.0 audio projects.
• Use the 3-wire cable for standby and mute functions.
  
• The 4-wire battery cable is for portable projects where AC or 12 VDC car power are not available. This cable plugs directly into all the Dayton Audio LLB series battery boards.
  
• 2-wire Blue Bluetooth status LED and 2-wire green signal LED to keep you informed.
  
• Add an optional SPST unmarked switch (sold separately) to the 2-wire on/off power cable to cut power to the entire board.
  
• 3-wire, 5-pin 3.5 mm AUX-in cable with jack provides a way to play music with non-Bluetooth devices.
  
• Four Potentiometers with 3-wire harnesses and knobs extends sound customization when programmed with SigmaStudio.
  
• External Bluetooth antenna with adhesive mounts outside metal enclosures to extend the Bluetooth range.