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ADJUSTMENT & TUNING
The amplifier automatically turns on a few seconds after you turn your vehicle’s ignition
switch to ACC or ON or turn on your auto sound system, depending on how you have wired the
system. The POWER indicator on the amplifier lights illuminates when the amplifier is on.
Important: This amplifier requires 30 amps or more of power from your vehicle’s battery during
operation. To protect your battery from discharging, do not operate the amplifier unless your
vehicle is running.
For the best performance, you must set the input level on the side of the amplifier to adjust the
level of the audio signals that enter the amplifier.
1. Using a small flat screwdriver, turn the input level fully counterclockwise to “MIN”.
2. Turn the auto sound system’s volume control to about one-third of its full range.
3. Adjust the input level (MIN/MAX) to a comfortable listening level.
4. Turn up the auto sound system’s volume control until the sound begins to distort. Then
immediately turn the volume down to a point just before where the distortion began.
5. Adjust the input level until the sound is at the level you want the amplifier to produce.
6. Adjust your head unit’s volume control to a comfortable listening level. Enjoy.
NOTE
Raising the
LPF frequency allows higher frequencies
to reach
the bass speakers while blocking
lower frequencies from midrange speakers. Lowering the Bass frequency allows lower
frequencies to reach the midrange speakers while blocking higher frequencies from bass speakers.
Variable Bass Boost Frequency Response
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Wiring Diagram
Model: HK-401SX
Mono Load Only
1 Ohm Minimum Load
Models: HK-102SX, HK-302SX
Stereo Mode
0.5 Ohm Minimum Load
Models: HK-102SX, HK-302SX
Mono Mode
1 Ohm Minimum Load
