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

Quick Overview

Dayton Audio DSPB-250 combines a 2 x 50W amp board with the ADAU1701 digital signal processor which enables you to customize sound using SigmaStudio software and Dayton Audio ICP1 Bluetooth programmer. Use the DSPB-250 as the heart of your DSP audio project, or combine it with the KAB-250v3 to make a Bluetooth DSP 4-channel project.

Product Highlights

  • Wire harnesses make installation quick and simple with no soldering required -- includes power, Aux-in and speaker cables
  • Connects directly to KAB-230v3 and KAB-250v3 with optional wiring harness (sold separately) to achieve 4-channel output and Bluetooth capabilities
  • Separate ports for powering by battery or direct DC input from 12 to 24V power source
  • Program with SigmaStudio software and Dayton Audio ICP1 (sold separately)
  • Efficient 2 x 50W of power from the TPA3116 amp chip

Product Manuals / Spec Sheets / Downloads

Dayton Audio DSPB-250 Quick Start Wiring Guide
Dayton Audio DSPB Series Amplifier Board User Manual

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.

We will customize the name of your Bluetooth amplifier board for free on order quantities of 20 or more, call 1-800-338-0531.

 

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 20 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 to 21.5 VDC, and 20 to 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 of 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. (15 VDC Min required and 24 VDC Max)

 

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"

Specifications:
• Power output (w/ 21 VDC power supply): 2 x 50W @ 4 ohms
• SNR: 92 dB
• THD: 0.02% @ 8 ohms, 10W, 1 kHz
• Frequency response: 22 to 22,000 Hz (±3 dB)
• Impedance: 4-8 ohms
• Bluetooth range: 30 ft.
• Recommended power supply: 12 to 24 VDC, 4A
• Recommended recharging power supply (NiMH, lead acid, or NiCad) 15 to 24 VDC, 1A
• Recommended recharging power supply (Li-Ion) 19 VDC, 1-5A
• 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 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.

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