Project Examples for the KABD-250 and KABD-230
Below are some examples of how the KABD-250 or KABD-230 could be used. Download the SigmaStudio
programming guide for the KABD series and the project pack found on the product page of the KABD-
230 or KABD-250 for details about how the necessary DSP programming can be achieved to achieve
these projects.
Portable Bluetooth Speakers, Boomboxes
The KABD series of amplifiers are optimal for portable and or battery powered speaker projects. This is
for many reasons.
1)
Efficient class D amplification that minimizes the amount of power needed to drive your
speakers.
2)
Bluetooth 5.0 with high quality aptX HD streaming
3)
A Battery Input Port (J6) that matches the ports of the LBB series battery boards from Dayton
Audio, the LBB-3v2 (12V) or LBB-5Sv2 (21V) for easy, portable power. Using a Dayton Audio
battery board takes the uncertainty out of how to use batteries for projects.
4)
Automatic power saving operation that drops power consumption to 105mW when a signal is
not detected. This ensures minimal power draw even when the speaker is accidently left turned
on.
5)
DSP optimization of drivers. This includes things like -
a.
Optimizing the bass output of small drivers
b.
Protecting the drivers with infrasonic (high pass) filters, limiters, bass control, etc
c.
Preset modes or potentiometer filter controls for on-the-fly adjustments to the sound of
your speaker. For example, more treble might be desired if a portable speaker is placed
on the ground away from ear level, or in an outdoor environment. However, if this same
speaker is placed on a coffee table in front of the listeners, less treble might be
required.
Desk Speakers
Desk speakers of all kinds can be made with the KABD-250 or KABD-230
1)
Stereo Pair of full Range Drivers Optimized with DSP
–
Many full range drivers can be greatly
improved if the frequency response is optimized with DSP. This could include things such as
selective bass boosts, treble boosts, or even just precise filters to correct other errors in
frequency response. A full range driver will usually not sound as good as a pair of 2-way
speakers with a properly designed crossover, however for many situations and listeners they can
sound more than acceptable. You could also use the line output capability of the KABD
amplifiers to connect a powered subwoofer to get the low end that many full range drivers can
lack.
2)
Retrofitting an existing pair of desk speakers to have built in amplification and optimization with
DSP. For example, you might have an old pair of 2-way speakers that already have crossovers
built in. By adding a KABD-250/230 inside of the cabinet of one of them, you can remove the
need for an external amplifier taking up precious real estate on your desk, and you can even
optimize the sound of your original speakers with DSP, add Bluetooth or
presets such as a ‘night
mode’ that has reduced bass to not disturb sleeping family or roommates. You could also use
