Specification Sheet

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KEYLOC™ Tech DOC

(July 2020)

Overview

The KEYLOC is a 2-channel DSP-based, active line-output converter.

The KEYLOC has two input level ranges: the Low range can accept 125mV to 10V; the Hi range can

accept 1V to 40V. It will output up to 10V which is adjustable by the output gain of the device. In the

low-level range, there is a 60Ω load for use with newer smart radios (that shut outputs off if they detect

there is no speaker on their outputs). If there is a need to load a source unit that has an output voltage

greater than 10V, please use the KISLOAD products instead of the KEYLOC’s built-in load resistors. The

KEYLOC also features DC-offset to turn on, and it will output a remote turn-on (100mA) to start up other

products.

The KEYLOC also can process the incoming audio from your factory source unit and apply the following

to the signal:

1. Smoothing of frequency response of TWO channels of your source unit via EQ correction. It can fix

EQs with Qs ranging from 0.5-10 with up to +/- of 12dB of boost or cut.

2. Factory time delay defeat ranging from .06mS – 10mS. The algorithm is accurate down to .06mS

which will move the first “null” of comb filters to at least 12kHz. This is a high enough frequency in

the audible range to not affect imaging.

3. ALL-Pass filter defeat. The KEYLOC can correct up to three all-pass filters on one channel. The All-

pass filters can have a Q ranging from 0.5-3.5 as long as they do not interact with the other All-Pass

filter’s phase.

4. Out of the box, before you run the KEYLOC through the setup process, it is in passive frequency

detection mode. You can use this mode of the KEYLOC to give you a really good idea of what band

of frequencies are available on the given wires that the KEYLOC is connected to:

• Low: 20Hz – 200Hz

• Mid: 200Hz – 2kHz

• High: 2kHz – 20kHz

Below are some samples of KICKER R&D’s testing of the KEYLOC that show before-and-after RTA curves,

as well as some tech tips to help if you are having issues.

Summary of content (11 pages)

PAGE 1
KEYLOC™ Tech DOC (July 2020) Overview The KEYLOC is a 2-channel DSP-based, active line-output converter. The KEYLOC has two input level ranges: the Low range can accept 125mV to 10V; the Hi range can accept 1V to 40V. It will output up to 10V which is adjustable by the output gain of the device. In the low-level range, there is a 60Ω load for use with newer smart radios (that shut outputs off if they detect there is no speaker on their outputs).
PAGE 2
Testing 1. 1kHz EQ filter with 12dB of boost with a Q of 3.5.
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2. 1kHz EQ filter with 12dB of boost with a Q of 0.5.
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3. Bass restoration of factory high-pass 100Hz.
PAGE 5
4. 12dB of boost at 80Hz. 12dB of boost at 4kHz. All-pass filter at 8kHz.
PAGE 6
5. High-pass crossover set at 80Hz with a slope of 12dB/octave. 6dB of boost at 1kHz. 6dB of boost at 8kHz.
PAGE 7
6. High-pass crossover set at 100Hz. 1kHz EQ filter with -12dB of cut with a Q of 0.5. 8kHz EQ filter with -12dB of cut with a Q of 3.5.
PAGE 8
7. 3 all-pass filters set at 80Hz, 360Hz, and 2kHz Q of 1.7.
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8. 3 all-pass filters with a Q of 2.4 with an EQ boost at 6kHz and an EQ cut at 18kHz.
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9. Time Delay with an EQ boost at 125Hz and 8kHz and high-pass crossover at 100Hz.
PAGE 11
Tech Tips: 1. If you have an issue go back and review the full manual it has all the info you will need to run the KEY process. 2. If you have issues getting a smoothed EQ response on an RTA or it just doesn’t sound smoother, PLEASE MAKE SURE THE SOURCE UNIT IS NOT CLIPPING. WE HAVE SEEN UNITS THAT WILL CLIP BEFORE ½ VOLUME. IF YOU HAVE AN O-SCOPE, USE IT WITH OUR GAIN MATCH TRACK TO WATCH THE SWEEP FOR CLIPPING. THEN TURN DOWN THE SOURCE UNIT UNTIL CLIPPING GOES AWAY.