DSPB-250 2x50W Class D Audio Amplifier Board with DSP

High Quality Audio Performance

The Dayton Audio KAB-250v3 Bluetooth Amplifier Board delivers high quality sound without drawing a lot power. This is due to the highly efficient TPA3116 Class D amplifier chip. The TPA3116 operates at 90% efficiency, thus eliminating the need for a heat sink and reducing its overall size. Its high efficiency 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.

Integrated Bluetooth

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.

Easy Installation

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 additional on board connectors with wiring harnesses (sold separately) available to speed-up installation and create confident connections, 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.

This amp board also includes an external antenna which must be used for maximum Bluetooth range and a Bluetooth pairing button which when short pressed resests the Bluetooth pairing. Make sure you don't long press Bluetooth pairing button. This will disable the Bluetooth chip and you must power cycle the amp board to reactivate it.

Optional Function Cables

Use the KAB-FC cables to customize any Dayton Audio KAB project. This four-cable kit comes equipped with Molex Mini Fit Jr connectors for easy termination to the board, and each cable is 20" in length.

• The AUX-in cable with 3.5 mm jack feeds music from any analog source directly to the KAB-230v3 board, enabling audio play from almost any non-Bluetooth source.

• The volume control with cable lets you manually control sound levels, and mounts into a 0.3" hole.

• The battery cable is for portable projects where AC or 12 VDC car power are not available. Multiple types of rechargeable batteries work with this cable and the board will charge the batteries when using an adapter with 15 to 24 VDC. Output wattage of the power adapter should never exceed 30 watts, as there is no under/over charging protection built in to the KAB-250v3 board.

• Using the on/off power cable cuts power to the entire board, but still provides power to the connected batteries for charging. An optional SPST switch is needed to accomplish this function.

Optional LED Light Status Cables

The KAB-LED light cable kit includes three different status LEDs that are clear when not in use, but light up blue, red, and green. The blue LED is used as the Bluetooth indicator, the red LED indicates power, and the green LED indicates charging.

Optional Interface Extension Board

The Dayton Audio KAB-INT provides a simple plug and play solution for custom applications. This interface board provides a 3.5 mm AUX-in jack, two USB A female ports for charging external devices, a momentary pushbutton switch that controls the standby function, and LED indicators for power and charging status. With the included 10-pin cable, the interface extension board easily plugs directly into the KAB-250v3 board.

Optional Li-Ion Battery Charging Board

The Dayton Audio KAB-BE Li-Ion battery charging board holds three 18650 batteries (sold separately). This charging board has built in under/over voltage protection circuits for safe charging and longevity. It balances different voltage between batteries in case one battery discharges faster than the others. A 19 VDC, 1-5A power adapter works best for charging batteries contained in this board. Additional boards can be sequenced together to provide longer playing time.

Please note: When removing batteries from the KAB-BE, the charging adapter must be plugged in momentarily after the new batteries have been inserted. Failing to do so will prevent the amp board from powering up.

Optional L-type Aluminum Bracket

It can be quite difficult to install the audio amplifier board into tight spaces such as portable sound applications. To securely mount the KAB-230v3 board and improve space efficiency Dayton Audio offers the KAB-AB; an optional L-type aluminum bracket. This aluminum bracket supports vertical and horizontal mounting configurations to satisfy different installation requirements. With four M3.5 screw lock standoffs, any Dayton Audio KAB board installs easily on the bracket using the four included security screws. Two M3.5 holes and seven slots give you the versatility to mount the L-type bracket to your project as needed.

Optional Standoff Kit

The PC Board M3 Standoff Kit is perfect for stacking multiple PC boards that are the same size, like the a KAB amp board on top of the KAB-BE battery board. Stacking PC boards enables you to use a smaller project box to install your project in. These standoffs will secure a single PC board, or a stack, if you use it with KAB-AB mounting bracket. They both use the same M3 thread. The kit features eight 16mm studs, eight 10mm studs, and 4 Phillips screws.

Optional Panel Accessory Kit

Add a professional finish to your Dayton Audio KAB amp board projects with the KAB-PMV3 panel accessory kit. Includes function cables, power switch, status LED’s, DC jack, pairing button, and all necessary tools and hardware for installation.

High Performance Power Supply

To meet the wattage output as listed in the specifications, using a 24V 5A DC Switching Power Supply is recommended. The power supply accepts inputs 100-240 VAC. Approved/listed by all major safety agencies; UL, CUL, and CE. Features a 5 ft. detachable input cord with a 2.5mm x 5.5mm x 9mm, center positive connector. This power supply can also be used with the KAB-BE.