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    Dayton Audio KAB-250v4 2x50W Class D Audio Amplifier Board with Bluetooth 5.0

    € 49,55€ 59,95 >10 In stock: delivery time 1-4 business days
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    Product description

    The extremely versatile Dayton Audio KAB-250v3 Bluetooth Amplifier Board allows for quick and easy addition of audio to any project, speaker build, point of purchase display, kiosk, or any location where audio enhances the experience. With an output of 2 x 50 watts, there is more than enough power to drive stereo speakers, yet the board is small enough to integrate into nearly any project.



    • Efficient 2 x 50 watts of power from the Texas Instruments TPA3116 amp chip
    • Bluetooth 4.0 with aptX built directly into board -- no need for a separate module
    • New for v3 is a U.FL IPX coaxial connector for internal or external Bluetooth antenna (internal antenna included) and a Bluetooth pairing reset switch
    • Board includes power and speaker output cables
    • Wire harnesses make installation quick and simple with no soldering required
    • Separate ports for powering by battery or direct DC input from a power adapter
    • Optional accessories expand functionality and more
    • 5-year Dayton Audio warranty


    Product details

    Dayton Audio KAB-250v3 2x50W Class D Audio Amplifier Board with Bluetooth 4.0

    Tip:  Take a look at the table in this blogpost to see which power supply to choose for this product.


    High Quality Audio Performance

    Integrated Bluetooth

    Easy Installation

    The Dayton Audio KAB-250v3 Bluetooth Amplifier Board delivers high quality sound without drawing a lot power. This is due to the highly efficient Texas Instruments TPA3116 Class-D amplifier chip. The TI TPA3116 operates at 90% efficiency, which becomes a major advantage when powering from batteries as it prolongs the playtime of a single charge. Its ultra-low distortion and pop-free performance make this hi-fi amplifier board an integral asset in any quality audio build.

    Unlike other amplifier boards, the Dayton Audio KAB-250v3 includes a built-in Bluetooth 4.0 module with aptX. The advantage of Bluetooth 4.0 is its low power consumption which prolongs the playtime of battery powered builds. The streaming audio quality rivals that of CDs thanks to the addition of the aptX codec by CSR. Designed and built for Bluetooth demonstration purposes, this fully functioning module provides a turn-key approach to Bluetooth certification for consumer goods. If the application of this board is for the hobbyist or industrial purposes then nothing is required to enjoy the full convenience of pairing and streaming high quality Bluetooth audio. The KAB-250v3 is also CE and FCC ready for certification purposes.

    Included with the KAB-250v3 are two wire harnesses: one for DC power 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 Molex Mini Fit Jr connectors to speed-up installation and create confident a connection, there is no need to solder or troubleshoot loose and unstable contacts. 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


    Due to the overall audio performance and built-in Bluetooth, this amp board has almost endless application possibilities. From hobbyists and DIYers to manufacturers and installation organizations this Bluetooth amp board has immense flexibility. For orders greater than 100 units, custom OEM Bluetooth pairing names are available -- email [email protected] for more details. 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:



    Extreme Low Standby Power


    The Dayton Audio KAB-250v3 will remain powered up to 7 days in standby mode even while Bluetooth is enabled. This standby time is approximately 4x longer than the competition due to the use of a high efficiency DC/DC converter which minimizes power consumption thanks to the employment of a micro controller as the PMU (Power Management Unit).


    Multiple Power Paths


    The Dayton Audio KAB-250v3 features numerous power options for creative, wireless sound projects. This flexibility eliminates limitations often caused by most other amp boards. Therefore, your design can be cord restricted or truly portable.


    For portable applications, there is an optional function cable kit (KAB-FC) which permits the connection of rechargeable batteries to power the board. NiMH, lead acid, or NiCad batteries will recharge straight from the board using a 15 - 24 VDC, 1A power supply. Use extreme caution because the Bluetooth amp board does not provide under/over charge protection and the connected power adapter cannot have an output greater than 30 watts.


    Solar charging is also an option, this application requires solar batteries with float (open) voltage with 16.5 - 21.5 VDC, and 20 - 100 watt panel. Eight AA alkaline batteries can also power this board, but do not connect the recharging feature for this type of use.


    The best rechargeable battery option makes use a separate interconnect board from Dayton Audio (KAB-BE) which holds three 18650 Li-Ion batteries. This portable power source is highly recommended since this add-on battery holder board does provide under/over voltage protection. A 19 VDC, 1-5A power supply is your best choice for charging the expansion board.


    Package Includes

    • One Dayton Audio KAB-250v3 Bluetooth Amplifier Board
    • One 2-conductor power cable 20"
    • One 4-conductor speaker cable 20"
    • One peel-n-stick Airgain™ internal Bluetooth antenna with 5" (127 mm) cable
    • One Bluetooth pairing reset push button switch with cable 20"




    Special Features




    Article number
    Rated power output
    2 x 50 watts at 4 ohms
    Minimum load
    4 ohms
    90 %
    Signal-to-noise ratio (SNR)
    92 dB
    0.02 % THD at 1 kHz, 10 watts
    Frequency response
    22 - 22,000 Hz
    26 dB
    Input sensitivity
    Input impedance
    Amplifier Classification
    Class D
    Circuit Topology
    Texas Instruments TPA3116
    Speaker output channels
    Input connection type

    4 pin PCB connector

    Speaker output connection type
    4 pin PCB connector
    DSP function
    check version 5.0
    EQ Adjustment
    Power Requirements

    12 - 24 VDC, 4 A
    15 - 24 VDC, 1 A (NiMH, lead acid, or NiCad charging supply)
    19 VDC 1-5 A (Li-Ion charging supply)

    Power inlet connector
    2 pin PCB connector
    Current limit
    Under/over voltage protection
    Dimensions (L x W x H)
    91 x 69 x 23 mm
    Mounting hole spacing
    84 x 61 mm
    Mounting hole diameter
    3.5 mm


    5 from 5Based on 5 reviews
    Review this product
    5 van 5
    I bought this little amp to build a bluetooth speaker, assembled it a few days ago, and at the moment I'm using it as a desktop amplifier for my computer or my mobile. Mobile by bluetooth, desktop with the auxilary input.<br />
    along with the amp I bought the control plate with leds, volumecontrol etc, and the holder for battery pack.<br />
    at the moment I'm using it to drive a set of Technics SB-M300, and the little amp has more then enough power to drive these not so very efficient speakers. Really positive surprised!! <br />
    As a power supply I use or the battery pack, or a Huntkey 19VDC 3.42A powersupply.
    By Bart Ketelbuters on 5 January 2021
    5 van 5
    This is the second one I've had. The first one I struggled with the bass and was going to return it .... until I realised speakers sound better in cabinets than test rigs.... DOH !!!
    So, now issue was sorted got another along with faceplate and second generation of my BT speaker is working and sounding great. Happy daze ;-)
    By Richard P. on 1 September 2020
    Show more

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    KAB-250v4  2x50W Class D Audio Amplifier Board with Bluetooth 5.0
    € 49,55
    € 59,95
    KAB-250v4 2x50W Class D Audio Amplifier Board with Bluetooth 5.0
    >10 In stock: delivery time 1-4 business days
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