Dayton Audio KAB-INT Interface Extension Board - Adds Power Switch

Our review of the Dayton Audio KAB-INT Interface Extension Board finds it is a small but meaningful upgrade for DIY Bluetooth amplifier projects. It is aimed at hobbyists and builders who want a neat, single-connection way to add a power switch, an analog AUX input and USB charging to a Dayton Bluetooth amp board; the single biggest reason to buy is convenience - the included 19' interconnect cable and one-board hookup remove a lot of wiring hassle and give a finished, user-friendly interface without modifying the main amp board.

Key Features

• Simple integration: The KAB-INT plugs into the amp board with the included 19' interconnect cable for a quick one-connection hookup that keeps the project tidy.
• Push button power: A push button on/off switch puts the amplifier into standby to save power and makes daily use convenient.
• AUX-in jack: The stereo 3.5 mm AUX-in lets you connect non-Bluetooth sources without swapping boards or rerouting wiring.
• USB charging ports: Two USB ports provide a 2A combined charging capability so you can top up phones or tablets while the system is in use.
• Finished interface: The board assembles the most useful user-facing controls and ports into a single, compact module for a polished final build.

Who It's For

The KAB-INT is best for DIYers assembling a Dayton Audio Bluetooth amplifier who want a quick way to add common user features without cutting traces or adding separate modules. It suits hobbyists building bookshelf or small desktop amplifiers who value neat wiring and the convenience of a standby switch and AUX jack.

It is less useful for installers who already use custom panels or full-size chassis with dedicated controls, or for those who do not need USB charging ports. If you require balanced inputs, digital inputs or advanced control features, look for a different accessory or a more feature-rich amp board.

Pros & Cons

Pros

• Consolidates power switch, AUX input and USB charging into a single board for simple installation and a polished finish.
• Push button standby helps reduce idle power consumption and simplifies user operation.
• Two USB ports with 2A combined output let you charge media devices while using the amp.
• Includes a 19' interconnect cable for quick hookup and minimal wiring work.

Cons

• Not a substitute for more advanced control panels; features are focused on basic connectivity and convenience rather than pro-level I/O.

Specifications

Product	Interface extension board for Bluetooth amp
Included cable	19' interconnect cable for hookup
Power control	Push button on/off switch (standby)
AUX input	Stereo 3.5 mm AUX-in jack
USB ports	Two USB ports, 2A combined charging capability
Intended use	Adds user-facing features to Dayton Bluetooth amp boards

Our Verdict

The KAB-INT is a compact, practical add-on for anyone finishing a Dayton Audio Bluetooth amp project; it delivers clear value by combining a standby switch, AUX jack and USB charging into one easy-to-install board. For DIY builders who want a tidy, user-friendly interface without complicated wiring, it is a solid, cost-effective choice.

Frequently Asked Questions

Does the board include a cable for connection?
Yes, it ships with a 19' interconnect cable to connect directly to the Dayton Bluetooth amp board for quick hookup.

Can the USB ports charge phones while the amp is playing?
Yes, the two USB ports offer a 2A combined charging capability so you can charge media devices during use.

Will this add a line-in option?
Yes, the board provides a stereo 3.5 mm AUX-in jack for connecting non-Bluetooth sources.