KABD-430 4 x 30W All-in-one Amplifier Board with DSP and Bluetooth 5.0 aptX HD

Quick Overview

The KABD-430 combines a 4 x 30W amp board, Bluetooth 5.0, and an ADAU1701 digital signal processor all in one amp board. This enables you to customize your next DIY audio project's sound using SigmaStudio software and Dayton Audio ICP1 or KPX Bluetooth programmer.

Product Highlights

  • All-in-one board design reduces space needed for audio DIY projects
  • Wire harnesses make installation quick and simple with no soldering required -- includes power, Bluetooth reset button and speaker cables
  • 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 4 x 30W of power from the two TPA3118 amp chips delivers clean powerful signal for creating up to 4-channel audio projects

Product Manuals / Spec Sheets / Downloads

Dayton Audio KABD-430 User Manual
Dayton Audio KABD-430 Quick Start Wiring Guide
Dayton Audio KABD Series SigmaStudio Programming Guide
Dayton Audio KABD SigmaStudio Example Projects

Buying Options

KABD Series Amp Boards

Dayton Audio KABD-430 Amp Board

The Next Level of DSP Amplification

Leverage the convivence of Bluetooth 5.0 and powerful DSP to truly create customizable audio projects with the accessibility of wireless streaming. The Dayton Audio KABD-430 combines a 4 x 30W amp board, Bluetooth 5.0, and an ADAU1701 digital signal processor all in one amp board. The four channel board provides the opportunity to expand your project in ways impossible before. The design of the KAB-430 enables you to customize your next DIY audio project's sound using SigmaStudio software and Dayton Audio KPX or ICP1 Bluetooth programmer.


The new Dayton Audio KABD series of boards are all provide integrated Bluetooth 5.0 with aptX, DSP, and a wire harness. The line comes with a 2x30W, 2x50W, 4x30W, and 4x100W versions. Check out what you can build with the all new KABD line.



All-in-one KABD-430 Amp Board with DSP & Bluetooth

What's New



  • Bluetooth 5.0 with aptX HD for high quality and long range streaming
  • Optimized for low power consumption for battery-powered projects
  • External potentiometer ports allow easy integration of volume, tone control, filters, and more for any project


Other Included Features


  • Reliable and power efficient Class D amplification
  • Easy to use plug-and-play solderless configuration
  • Integrated ADAU1701 DSP chip for ultimate signal control and customization via the free SigmaStudio software
  • DSP controlled line level output for connecting powered subwoofers or external amplifiers
  • Bluetooth 5.0 or line-level AUX input accommodates wireless and wired audio connection



High Quality Audio Performance

The Dayton Audio KABD-430 DSP Amplifier Board delivers high quality sound without drawing a lot power. This is due to the highly efficient TPA3118 Class D amplifier chip. The TPA3118 operates at 88% efficiency, thus eliminating the need for a large 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 DSP Chip

Unlike other amplifier boards, the Dayton Audio KABD-430 includes a built-in ADAU1701 DSP chip. Create nearly limitless possibilities of EQ, crossover, bass enhancement, time alignment and more thanks to the ADAU1701 DSP chip. Make advanced crossovers with ease without capacitors, inductors, or preamp boards, and get almost immediate feedback on how your project sounds. SigmaStudio software and Dayton Audio DSPB-ICP1 or KPX programming boards (sold separately) combine together to let you set audio parameters to produce hi-fi quality sound. Download SigmaStudio into your desktop or laptop computer and plug the small ICP1 or KPX board into the USB port using a USB cable (sold separately). To quickly adjust the sound there are four potentiometers (sold separately) that plug into four sockets on the KABD-430 amp board..


Highest Quality Bluetooth

The Dayton Audio KABD-430 includes a built-in Qualcomm Bluetooth 5.0 module with aptX HD. The advantage of Bluetooth 5.0 is its low power consumption which prolongs the playtime of battery powered builds. The streaming audio quality rivals that of CDs since the Bluetooth chip supports aptX, aptX HD, aptX LL, SBC & AAC. High receive sensitivity with RF power up to 9 dBm and -90 dBm, and on board antenna insure stable wireless connectivity up to 15m (50ft.) On board external antenna jack enables the KAB board to be mounted in a metal enclosure with an external antenna (sold separately). 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 KABD-430 is also CE and FCC ready for certification purposes.

Included with the KABD-430 are three wire harnesses: one for DC power, a 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.

Control Panel

Adding optional potentiometer controls has never been easier


  • Completely customizable with SigmaStudio, external potentiometers can be programmed for on the fly adjustment of volume control, tone controls, high and low pass filters and so much more
  • Set limits on max volume to prevent accidental overloads to your speakers
  • Can’t decide on one fixed treble level for your portable speaker? Put a treble knob on it and adjust it on the spot
  • Love the bass during the day, but want to tone it down at night? Add a bass knob!
  • Set high/low pass variable frequency filters to fine tune your sound
  • Potentiometers headers can also be configured for toggle switches or push buttons for toggling presets or custom sound modes


SigmaStudio Integration

Although your KABD amplifier houses its own ADAU1701 DSP chip, to communicate with your PC, a USBi programmer is required. Dayton Audio has two compatible programmers -- the DSPB-ICP1 and the KPX. The programmer can be thought of as the bridge between your PC and your DSP chip so that they can communicate.

SigmaStudio Programming

What do I need to connect my KABD Amplifier to SigmaStudio?


  • A Windows PC / Laptop with available USB Port
  • The free SigmaStudio download
  • A KABD Amplifier and recommended power supply
  • A compatible USBi programmer and USB cable
    • Dayton Audio DSPB-ICP1 (Micro USB)
    • Dayton Audio KPX (USB Type C)



Bass Optimization

Low pass and infrasonic (high pass) filters offer total control over the range your woofers play, and precise PEQ can optimize the bass response of the woofer to your tastes. EQ could even be used to apply room equalization to improve the accuracy of your speaker’s bass performance inside of a specific room.



Dynamic Bass Enhancement

Dynamic Bass Enhancement increases the proportion of bass at lower volumes, while decreasing the proportion of bass at higher volumes. Common practice in commercial Bluetooth speakers, this allows for a full, bass heavy sound from small drivers or exciters at lower volumes, but protects them from being overdriven at higher volumes.


SuperBass algorithm uses principles of psychoacoustics to increase perception of bass by generating harmonics above the chosen crossover frequency. This can be especially useful when using small drivers or exciters.

Bass Boost

Analog Device’s Dynamic Bass Boost Algorithm will provide more bass boost at lower input levels than it will at higher volumes. This type of boost is incredibly common in portable speakers, creating the effect of the speaker sounding full and bass-y at low volumes, but prevents overdriving the speaker at higher volumes. If this block is too confusing or in depth for you, see the next page for a simpler version.

Precise Tonal Control

This could include things such as selective bass boosts, treble boosts, or even just precise filters to correct other errors in frequency response.

Parametric EQ

There are many types of filter blocks, however the parametric EQ block allows for graphic, easy to use and precise adjustment of numerous bands of peaking filters, high/low pass filters, tone shelves and more.

Potentiometer Controlled Filters

Control your filters with the external potentiometers which will adjust the filter based on the position of the potentiometer. This filter works by pre-calculating a specific number of filters based on user parameters, and then storing them into the DSP memory

Project Ideas

Use this full function, adjustable amplifier board with built-in DSP chip and Bluetooth 5.0 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 4 x 30W DSP amplifier board to peak performance in your finished product. The KABD-430 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:

Project Gallery

SigmaStudio Example Projects and Programming Guide


  • Even without any DSP experience, easy to use example project files for all kinds of speaker projects are available pre-configured and easily customizable with SigmaStudio.
  • A detailed but easy to follow SigmaStudio programming guide for the KABD Series makes it easy to learn DSP concepts so you can make your own completely custom projects in no time.



Need more inspiration?

For even more ideas check our project gallery full of our community of DIY audio enthusiast projects

Portable Power Paths

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-430 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-430 DSP Amplifier Board
  • One 2-conductor power cable 20"
  • Two 6-conductor speaker cable 20"
  • One Bluetooth reset button with 20" cable


  • Power output (w/ 24 VDC power supply): 4 x 30W @ 8 ohms
  • SNR: 97 dB 4 x 30W @ 8 ohm, THD+N=1%, 25.8 dB, A-weighting
  • THD+N: 0.06% 10W @ 8 ohm 1 kHz 26 dB
  • Frequency response: 20 to 20,000 Hz (±3 dB)
  • Impedance: 4-8 ohms
  • Recommended power supply: 12 to 26 VDC, 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

We Got Your Back

We stand behind our products and our warranty is a demonstration of our commitment to quality and reliability.

Shop the All New KABD Line

The new Dayton Audio KABD series of boards are all provide integrated Bluetooth 5.0 with aptX, DSP, and a wire harness. The line comes with a 2x30W, 2x50W, 4x30W, and 4x100W versions. Check out what you can build with the all new KABD line.


Channels: 2

Power Output: 30W/Ch

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Channels: 2

Power Output: 50W/Ch


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Channels: 4

Power Output: 30W/Ch


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Channels: 4

Power Output: 100W/Ch


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Optional Function Cables

Use the KABD-SPF cable kit to customize any Dayton Audio KABD project. Each wire harness comes equipped with mini connectors for easy termination to the board, and each cable is 20" in length.


  • 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.



Optional Programing Interface Board

The Dayton Audio DSPB-ICP1 provides a solution to programing the KABD-430 amp board using SigmaStudio software. Download SigmaStudia software to your computer and send programming instructions using a micro USB cable (not included) to the DSP-ICP1 programing board that installs settings into the KABD-430 amp board with the included 6-pin cable.

Please note: The included cable has the same 6-pin plug that joins the KAB-430v3 to the KABD-430. Make sure the programing board plugs into J-5 or #7 in the quick reference guide.

Optional Li-Ion Battery Charging Board

The Dayton Audio LBB-3v2 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. 12 to 24 VDC, 1-5A power adapters work best for charging batteries contained in this board, but they accept as low as 5 VDC adapters. Higher rated voltage and current charge the batteries faster.

For more power output and longer play time use the Dayton Audio LBB-5Sv2 and LBB-5v2 battery boards. The Dayton Audio LBB-5Sv2 18650 5-cell battery board delivers more voltage output which increase the wattage output of the KABD-430. The Dayton Audio LBB-5v2 26650 5-cell battery board delivers more voltage output and has more current available which increase the wattage output and play time for the KABD-430.

Please note: When removing batteries from the LBB series battery boards, 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 KABD-430 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, most Dayton Audio KAB and DSPB amplifier boards install 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 a DSPB amp board on top of the LBB-3 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, 4 pcs 10mm, and 8 Phillips screws.

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.

Model Number KABD-430
Color Red
Unit of Measure Each
UPC 848791008191
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.3
Product Weight --
Product Height 1.25"
Product Width 3.25"
Product Length --
Product Depth 5"