DaytonAudio KABX User manual

KABX DSP Control Software Guide

Overview

•The KABX DSP Control software is

compatible with new generation

Bluetooth 5.0 w/aptX HD KAB amplifiers

when combined with a KPX

programmer. This software offers easy

but extensive DSP customization with no

experience required.

•The software provides simple control of

10 band of PEQ, High Pass Filters, Low

Pass Filters, Compressor / Limiters, Bass

Effects and More

•KPX Programmer connection is only

needed temporarily, DSP presets can be

saved to the KAB amplifier itself and the

programmer can be removed. This also

means that one programmer can

program as many amplifiers as needed.

Overview

What do I need to get started?

•A KPX Programming Board

•A KABX DSP Control compatible KAB

amplifier. This includes KAB amplifiers

with Bluetooth 5.0 w/aptX HD.

•KAB-250v4 (2x50W), KAB-230v4(2x30W), KAB-

100Mv2(1x100W)

•A USB cable with one end being USB

Type C.

•The other end can be either type A or type

C, depending on what type of port you have

on your computer

•A Windows PC with available USB port

and permissions to install the KABX

Software

KAB-250v4

KPX Programmer

KAB-230v4

Connection Process

•Connection of the KPX programmer to your

KABX compatible amplifier is simple, but for

more details see the KPX User Manual.

1. Set your KPX programmer to “KABX”

mode (see back of board)

2. Connect your KPX programmer to your

Windows PC with a USB type C cable

3. Connect your KABX compatible amplifier

to your KPX programmer using the 4-pin

connector included with the KPX

programmer.

4. Launch the KABX software. It should

connect immediately.

Saving to Non-Volatile Memory

(Retaining Settings After Power Cycle)

•While using the KABX Control software, changes to DSP will be

able to be heard immediately, and those changes will exist while

the connected KAB amplifier has power and it turned on.

However, these changes will be lost when power to the KAB

amplifier is lost.

•To prevent this, the current program must be saved to “non

volatile” memory, which means memory that holds data even

when power is lost. To do this, you must press the “save” button

in the top right corner whenever you are ready. This will make

sure your program remains after a power cycle. The software will

also prompt you to save when you exit the program.

•The top bar of the KABX software, when connected to a

compatible amplifier, will display “KABX” or “ * KABX” in green.

This means that the amplifier is connected, but also shows save

status.

•When “KABX” is shown, that means that current DSP preset is saved to non-volatile

memory of the KAB and will be retained even after a power cycle.

•When “* KABX” with an asterisk shows, this means that your DSP preset is NOT saved

to non-volatile memory. This means that even though you can hear the changes you’ve

made, you will lose these changes if power to the KAB is lost. To prevent this lost, press

save in the top right corner.

EQ Controls

•Stereo vs. Mono

•Compatible KAB amplifiers at the time of

release have 2 audio output types. The first

is the stereo powered output via J2, and the

second is a mono, line level output via J12.

These outputs can have completely

independent EQ.

•Bypass

•This button will turn off all bands of EQ, but

will not reset values. Perfect for testing EQ

presets against the original sound.

•Reset

•This button will reset all EQ values to default.

EQ Filter Types

•The KABX DSP software offers 4 filter

types for each EQ band.

•Peaking

•The default and most common type of EQ filter. It

has adjustable center frequency, Q (bandwidth) and

gain value.

•Useful for creating bass boosts, treble boosts and so

much more.

•There is an inverse relationship between the Q

value and the bandwidth of the filter, which means

as you increase the Q value, the bandwidth

reduces, and as you decrease the Q value, the

bandwidth increases

•Notch

•Notch filters will remove a very narrow bandwidth

of frequency content. Useful for removing the

sound caused by an unwanted resonance.

Peaking

Notch

EQ Filter Types

•High Pass

•High pass filters cut out frequencies lower than the targeted

frequency. The high frequencies “pass” through the filter

unaffected. Used in crossover circuits to prevent tweeters

from playing low frequencies, or for protecting ported

systems or small drivers from playing bass notes lower than

they are capable.

•Low Pass

•Low Pass Filters cut out frequencies higher than the targeted

frequency. The low frequencies “pass” through the filter

unaffected. Generally used in crossover circuits to prevent

woofers from playing high frequencies.

•This type of filter is essential for a subwoofer or bass shaker

•The Q value of a HP or LP filter will determine the

alignment of the filter. This will be described on the next

page.

High Pass

Low Pass

High and Low Pass Filters –Slopes and Q

•Slopes

•The slope of the HP or LP filters offered

in the KABX Software is 12 dB per

octave, which can easily be seen in the

software’s graph.

•Higher order (steeper) slopes can be

achieved by using multiple filter bands

set to HP or LP filters.

•The Q value of the HP or LP filter will

determine the alignment of the filter.

•Q = 1.0 –Chebychev

•Q = 0.707 –Butterworth (Maximally flat)

•Q = 0.58 –Bessel

•Q = 0.49 Linkwitz-Riley

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