Kicker SX1250.1 Quick Setup Guide

This is your “EMERGENCY, I DON’T HAVE TIME FOR INSTRUCTIONS, 

ABSOLUTELY HAVE TO GET IT UP AND RUNNING NOW”, 

OK…Now that we’ve got your attention…By following the steps in this quick-start guide you’ll be able to get your hot new 

SX amplifier kickin’ faster than you can say “Livin’ Loud!”

• 

You are now in the Default screen.

• 

You can fine tune these settings later. 

Now that you have completed STEP 3 and properly set the GAIN
RANGE you can now adjust the GAIN.

Press the 

or

keys until the display

reads 

GAIN

and press the 

key.

If you have a .2 or a .4 amplifier, decide if you want to adjust the left

or right channels separately or both channels at the same time. For a
.1 series amplifier skip steps B-I and B-II and go directly to step B-III.

B-I. For a .4 amplifier, you will need to select either

AMP1

(front channels) or 

AMP 2

(rear channels)

before moving to step B-II. Use the 

or

keys to select

AMP1

or 

AMP 2

and then press

.

B-II. For a .2 or .4 amplifier, use the 

or

keys to select 

LEFT

RIGHT

or 

BOTH

channels. Press

. 

B-III. Use the 

or

keys to adjust the gain

of the amplifier to desired level. 

0

is recommended

for best signal-to-noise ratio. Increase from there if
necessary...using the lowest setting possible.

B-IV. Press the 

key once to save your

setting. For .1 Series amplifiers you can now proceed
to step 

B-V. For .2 and .4 series amplifiers you can select

LEFT

RIGHT

or 

BOTH

if you wish to adjust another

channel. Select a channel using the 

or 

keys, press 

and start back at step B-III. 

B-VI. For .4 series amplifiers press 

to

return to step B-I and select another amplifier for
adjustment. For .2 series amplifiers, pressing

will return you to the 

GAIN

menu

Press 

each time you want to back up one level.

Pressing and holding the 

key for 2 seconds will take you

directly back to the Main menu. Your current settings are automatically

saved. 

The SX Amplifiers’ UltraMatch gain structure features both a digital
input gain attenuator with five selectable Gain Ranges (1 volt, 2 volt,
4 volt, 8 volt and 16 volt) AND 12dB of “tweakable” Gain adjustment in
each range! This super wide adjustment range allows SX amplifiers to
crank with anything from budget head units to the highest power 
factory decks!

In “Gear-Head” terms, the Gain Range and Gain adjustments can be
compared to the gear box and gas pedal of a race car. The Gain
Range represents what gear you’re in and the Gain represents 
stepping on the gas. Just like a race car, THE GAIN RANGE OF
YOUR AMPLIFIER NEEDS TO BE CORRECTLY ADJUSTED TO
PROVIDE MAXIMUM PERFORMANCE! Here’s how to do it:

. Press the 

key to access Main menu.

Scroll through the Main menu using the 

or

key until the display reads 

SYSTEM

and press

the 

key to access 

SYSTEM

menu.

Use the 

or 

keys until the display reads

GAIN RANGE

. Press 

to select  the 

GAIN

RANGE

menu.

A standard car radio or head unit typically produces

less than a 4 volt RCA output. Use the 

or 

keys until the display reads 

1 V RANGE.

If your radio is

actually capable of providing an RCA output voltage 

equal to or greater than 2 volts, adjust the gain range as 
necessary. If using speaker level signals, set the 

GAIN RANGE

to 

8V RANGE

or 

16V RANGE

Press the 

key twice to return to the

MAIN menu. (Your 

GAIN RANGE 

setting will be 

automatically saved) 

(x 2)

Full Range with Subsonic Filter.

12 dB Hi-Pass @ 25 Hz

High Pass Amp 1 & Amp 2.

24 dB Hi-Pass @ 84 Hz

Low Pass Amp 1 & Amp 2.

24 dB Lo-Pass @ 84 Hz

High Pass Amp 1 & Low Pass Amp 2. 

24 dB Hi-Pass @ 84 Hz / 24 dB Lo-Pass @ 84 Hz

Full Range with Subsonic Filter.

12 dB Hi-Pass @ 25 Hz

High Pass.

24 dB Hi-Pass @ 84 Hz

Low Pass with Subsonic Filter.

24 dB Lo-Pass @ 84 Hz / 12 dB Hi-Pass @ 25 Hz

Midbass Band Pass. 

24 dB Hi-Pass @ 84 Hz / 24 dB Lo-Pass @ 177 Hz

Low Pass with Subsonic Filter.

12 dB Hi-Pass @ 25 Hz / 24 dB Lo-Pass @ 80 Hz

...Memory 1 Plus Bass Boost.

+6 dB @ 40 Hz / Bandwidth (Q) 3.0

...Memory 2 Plus Kompressor.

Kompressor set on Contour

...Memory 2 Plus Kompressor.

Kompressor set on Red-Line

READ THE MANUAL !!!