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Kicker ix 254 impulse Manual

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Congratulations! You have just purchased one of the latest in a long line of
exceptional car audio power amplifiers from Stillwater Designs. Your KICKER
Impulse was designed and engineered by the same team which created
many other international award winning KICKER components like the ZR, ZX,
and XS-Series amps. It contains a number of cutting-edge features to give
you outstanding performance
Thanks for buying KICKER. Enjoy.
KICKER IMPULSE AMPLIFIER FEATURES
A set of RCA output jacks on your KICKER Impulse four-channel amplifier allows you to
build multiple amplifier systems without using RCA splitter cords to distribute the signal.
Now it is simply a matter of bringing one set of RCA cables into the first amplifier, then
using the output RCA jacks as a feed to the next amplifier. A rear channel input switch
allows four-channel output operation from either one or two inputs.
Amplifiers are stable at 2 Ohms stereo and as low as 4 Ohms in mono.
Input connections are included for high and low level signals for use with radios that
have either RCA or speaker level outputs.
An electronic crossover is built in for convenience and allows you to select high pass for
satellite speakers, low pass for subwoofers, or bypass for full range operation. In full range
configuration the KICKER Impulse amplifiers will operate stereo and mono and at the same
time.
Auto-resetting short circuit and overthermal protection circuits are incorporated to pro-
tect the amplifier from failure due to extreme conditions.
State of the art circuit including MOSFET power supply and glass epoxy circuit boards
are used to ensure many years of trouble free operation.
IX254, IX404, IX704
Four-Channel Power Amplifier
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More Systems for the IMPULSE Four-Channel amplifiers
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Troubleshooting
The LED mounted on the end panel of the amplifier lights up in two different colors
depending on the condition of the amplifier. Green indicates that the amplifier is turned on
and no trouble exists. When it turns red this indicates that the protection circuit has been
engaged. The LED on the top of the amplifier chassis indicates that the amplifier is on.
When the protection circuit is engaged, this LED turns off.
Green power indicator off, no output:
• With Volt Ohm Meter (VOM) check:
1. +12v power terminal
2. Ground terminal
3. Remote turn-on lead
Green power indicator on, no output:
• Check RCA connections
• Test speaker outputs with known good speaker
• Check function of source unit
• With VOM in AC volts position check RCA for signal
No output from one channel:
• Check RCA and speaker connections for that channel
• Swap RCA connections from left to right
• Swap speaker connections between channels
Red LED protection indicator is lit and there is no output:
Case 1: Amp is very hot
• Thermal protection is engaged. Check for proper impedance at speaker
terminals. Also check location of amplifier to ensure proper air flow
around heatsink.
Case 2: Output resumes momentarily when system is
turned off and back on.
• Short circuit protection is engaged. With VOM check for short between
speaker positive and negative, and between speaker terminals and ground.
Alternator noise (a whining that varies with engine RPM)
• Make sure that the ground for the source is as short as possible and
connected to bare chassis metal. The stock radio ground may not be sufficient.
• Check RCA cable routing and condition. Keep RCA cables away from all
power wires.
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Adjustments and Controls Setting Gain Control
The gain control is provided for level matching purposes. The control does not give
the amplifier any more power by turning it up. Its purpose is to adjust the sensitivity of
the amplifier in relation to the output level provided by the source.
Start with the amp gain set to minimum by turning the control counterclockwise. Turn
the source level up until distortion is barely audible. Then turn it down slightly. This will
typically be about 85% to 95% of full volume. Raise the amplifier gain until distortion is
just audible. The gain is now set correctly. Check the level with cd/tape and tuner to make
sure the adjustment is correct for all sources.
Setting KICKEQ™ Controls
The Bass and Treble controls on your Impulse Amplifier are provided to help tune your
system for ideal sound quality. After the system is installed and the vehicle is put back
together, do the listening test with music that is typical of the type you normally listen to.
Initially set the tone controls on the source unit to flat and turn the KICKEQ™ controls
fully counter-clockwise. Depending on your personal taste and the speakers used in the
system, you may want to increase the high or low frequencies by turning the KICKEQ™
controls clockwise. Remember that once the vehicle is in motion there will be apparent
loss of bass due to the masking effect of road noise. Do not attempt to make
adjustments while the vehicle is in motion. It is safer to pull off the road to
make changes.
Never change the crossover settings while the amplifier is on. A loud pop
will result which could destroy speakers or cause hearing loss.
SPECIFICATION
Model IX704 IX404 IX254
RMS Power (Watts/Channel) @12.5V, 4Ω Stereo 70 x 4 40 x 4 25 x 4
0.085% THD, All Channels Driven
RMS Power (Watts/Channel) @12.5V, 2Ω Stereo 105 x 4 60 x 4 35 x 4
0.2% THD, All Channels Driven
RMS Power (Watts/Channel) @12.5V, 210 x 2 120 x 2 65 x 2
4Ω Bridged Mono, 0.2% THD
Dynamic Power (Watts/Channel) @14.4V, 100 x 4 55 x 4 30 x 4
4Ω Stereo, 0.085% THD, All Channels Driven
Dynamic Power (Watts/Channel) @14.4V, 140 x 4 80 x 4 42 x 4
2Ω Stereo, 0.2% THD, All Channels Driven
Dynamic Power (Watts/Channel) @14.4V, 280 x 2 160 x 2 85 x 2
4Ω Bridged Mono, 0.2% THD
Dimensions (In., MM) 13.8, 350 11.4, 289 7.8, 198
(All Models 2.5”H x 9.5”W x ...”L,
63mmH x 241mmW x ...mmL)
Frequency Response 20Hz-20kHz ±0.5dB
Input Sensitivity High Level 1V-10V, Low Level 150mV-3.0V
Signal-to-noise Ratio >95dB, a-weighted, re: rated power
Active Electronic Crossover 18dB/ octave, selectable @70Hz or 110Hz;
KICKEQ™ Bass Boost Variable to +18dB, centered @ 40Hz
KICKEQ™ Treble Boost Variable to +12dB, centered @ 18kHz
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  • having trouble under standing what the switches do on the input side do off on parallel off HP LP mode 70Hz 110Hz frequency do Submitted on 30-10-2021 at 03:51

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