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Dayton Audio KABD-4100 4 x 100W Bluetooth Amp Board with DSP

Based on 4 reviews
Condition: New
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$105.92

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Availability: In Stock.
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Arrives Friday, Nov 6
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At a glance

Condition
New
Model
KABD-4100
Dimensions
6 x 4 x 2 in
Weight
14.4 oz
Maximum Supply Voltage
39 V DC
Minimum Supply Voltage
10 V DC
Mounting Type
Board Mount

Features 5

  • 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 two sets of speaker cables
  • Separate ports for powering by battery or direct DC input from 12 to 39V power source
  • Program with SigmaStudio software and Dayton Audio ICP1 or KPX boards (sold separately)

Description

Dayton Audio KABD-4100 combines a 4 x 100W 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. Key features 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-4100 combines a 4 x100 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. Cascade the board to create up to 8 channels of audio. The design of the KAB-4100 enables you to customize your next DIY audio project's sound using SigmaStudio software and Dayton Audio KPX or ICP1 Bluetooth programmer. The Dayton Audio KABD-4100 DSP Amplifier Board delivers high quality sound without drawing a lot power. This is due to the highly efficient TDA749x Class D amplifier chips. The TDA749x operates at 89.5% 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. Unlike other amplifier boards, the Dayton Audio KABD-4100 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-4100 amp board.. The Dayton Audio KABD-4100 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 quality Bluetooth. The KABD-4100 is also CE and FCC ready for certification purposes. 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. 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. For portable applications, there are two battery holder/charging boards which permit the connection of li-Ion rechargeable batteries to power the board. First is the Dayton Audio LBB-5Sv2 5-cell 18650 battery holder/charger board that is the same size as the KABD-4100 which makes it easy to stack the boards with standoffs. If you desire more performance time on one full charge, use the 5-cell 26650 Dayton Audio LBB-5v2 board which has a larger footprint than the KABD-4100. They both work with 5 to 24 VDC power supplies. These portable power sources are highly recommended and both 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. 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 Audio components and products designed for every journey. At Dayton Audio, we’re passionate about making great sound accessible. We design high-quality, high-value audio products for builders, creators, and music lovers of every level. With U.S.-based engineering and a commitment to innovation and reliability, we’re here to help you enjoy, customize, and create the audio experience you’ve always imagined. We started over thirty years ago with a mission to make great sound accessible. Today we pair U.S. engineering with global manufacturing to deliver performance and value. We combine advanced engineering with affordable design, delivering performance that rivals premium brands. Every product reflects customer feedback, giving builders and audio enthusiasts products they can trust. We’re inspired by the creativity of the audio community. Helping people build or refine their projects fuels our passion.

Specs 15

Item dimensions L x W x H 6 x 4 x 2 inches
Manufacturer Dayton Audio
Maximum Supply Voltage 39 V DC
Minimum Supply Voltage 10 V DC
Mounting Type Board Mount
Number of Channels 4
Maximum Output Power 400W
Item Dimensions 6 x 4 x 2 inches

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


Incredible little board!
This little powerhouse provides so much value for the money! With the built in DSP, you can sigma studio your way out of nearly every audio challenge! I was able to build a single, 3 speaker portable PA system with a built in crossover controller entirely from the DSP. Unbelievable technology!
Reviewed in the United States on February 9, 2026 by GregTX

awesome extremely customizable
a great amp that is highly customizable with the built in dsp
Reviewed in the United States on January 15, 2026 by edward augsburger

DSP? lol
Amp is great but do not plan on using DSP, it is impossible to connect to and PE gives minimal support as they did not make this.
Reviewed in the United States on October 24, 2025 by angryandroid

Amazing amp for it's price.
Perfect for home audio or for building active studio monitors. Default factory settings is for 4 channel (perfect for car speakers), but if you bridge 2 of the channels together, that pair gets a low pass filter and becomes a subwoofer channel automatically which is perfect for a 2.1 setup. You can't bridge both sides (with factory settings) and get a 2 channel amp, they will both be left channels unless you reporgam the DSP. . The DSP onboard is good for setting up crossover, compressors, EQ's. You can use it to copy any one of those expensive studio monitors you see out there since it packs a great punch and you can tune it to sound however you like! If you're using it for an 8" monitor, you need a 24v supply (or you can go 36v but then it will be at maximum voltage all the time so the fan will kick on every few seconds). The Bluetooth cannot be turned off. You can disconnect the Bluetooth audio in the programming, but your phone will still connect without sound, but the Bluetooth board itself will always be on. ... show more
Reviewed in the United States on August 12, 2025 by Michael T
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