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Kicker 43DXA250.1

Mono subwoofer amplifier — 250 watts RMS x 1 at 2 ohms

Item # 206DXA2501

Kicker's DXA250.1 subwoofer amplifier can put out some great-sounding bass — the kind that grabs your...

Kicker's DXA250.1 subwoofer amplifier can put out some great-sounding bass — the kind that grabs your...

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About the Kicker 43DXA250.1

Power for your sub

Kicker's DXA250.1 subwoofer amplifier can put out some great-sounding bass — the kind that grabs your attention and makes listening to music in your car more fun. And this reliable amp delivers up to 250 watts RMS from a compact chassis that'll fit into a lot of places in your vehicle.

Power for your sub

Kicker's DXA250.1 subwoofer amplifier can put out some great-sounding bass — the kind that grabs your attention and makes listening to music in your car more fun. And this reliable amp delivers up to 250 watts RMS from a compact chassis that'll fit into a lot of places in your vehicle.

Works with a factory radio

Kicker's Fail-Safe Integration Technology (FIT™) allows you to tap into your vehicle's factory speaker wiring for the amp's input signals without needing a converter. The "differential-balanced" inputs also help prevent audio interference and noise from entering the system.

Controls to help get the job done

The DXA250.1's low-pass filter adjusts the range of frequencies going to your sub so it can play bass more cleanly and efficiently, while a bass boost can add some extra foundation to the sound if you want. You can add an optional wired remote control to adjust the volume of the bass from your front seat.

Kicker 43DXA250.1

DXA250.1 inputs and controls

Confused about impedance? Check out our article on matching subs and amps.


Product highlights:

  • mono subwoofer amplifier
  • 125 watts RMS x 1 at 4 ohms (250 watts RMS x 1 at 2 ohms)
  • CEA-2006 compliant
  • variable low-pass filter (50-200 Hz, 12 dB/octave)
  • fixed subsonic filter (25 Hz, 24 dB/octave)
  • variable bass boost (0-12 dB at 40 Hz)
  • Class D amp technology
Other Features:
  • differential-balanced inputs help eliminate noise
  • preamp inputs and outputs
  • speaker-level inputs require speaker wire to RCA adapters
  • optional remote level control available
  • 8-gauge power and ground leads and a 40-amp fuse recommended — wiring and hardware not included with amplifier
  • no onboard fuses — when installing multiple amps in a system, an additional 40-amp in-line fuse between the distribution block and the amplifier is recommended
  • 8-3/16"W x 2-3/8"H x 7-1/8"D
  • warranty: 2 years (extends to 3 years when purchased with a Kicker 8-gauge amp kit or multi-amp kit)
  • Our 60-day money-back guarantee
  • MFR # 43DXA2501

What's in the box:

  • Mono amplifier
  • 4 Self-tapping screws (M3 x 20mm)
  • Owner's Manual

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Product Research



CEA-2006 Compliant: CEA-2006 is a system of testing and measurement methods for mobile audio amplifiers. This voluntary standard advocates a uniform method for determining an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured over the full frequency range of the amp with 1% or less Total Harmonic Distortion plus noise (THD+N). Signal-to-Noise ratio is measured in weighted absolute decibels at a reference of 1 watt. CEA-2006 allows consumers to compare car amplifiers and receivers on equal footing.

DXA250.1 Output: Measured under CEA-2006 conditions the Kicker DXA250.1 is rated at 125 watts RMS x 1 channel into a 4-ohm load and 250 watts RMS x 1 channel into a 2-ohm load (measured using a 14.4 volt power supply).

Auto Turn-On: There are two ways to automatically turn on the amplifier. Most aftermarket car stereo head units will have a remote turn-on lead, which can be extended to the amplifier location and connected to the amp's Remote terminal. If connecting the amplifier to a factory stereo, or a head unit without a remote turn-on lead, the amp can automatically turn on using the DC Offset mode. The amp detects a 6-volt DC surge on the signal inputs and turns the amplifier on. There is no switch on the amp to select the Turn-On method.

Protection Circuitry: The DXA250.1 has protection circuitry that will turn the amp off in the event of overheating, over voltage (over 16 volt input), under voltage (under 10 volt input), and short circuit (speaker output). If the Protection LED on the right side of the amp illuminates red, the protection circuit has engaged and the amp will not play until the problem is resolved.

Dual Input Sensitivity: The DXA250.1 can receive low- or high-level signals from your car stereo source unit at the amplifier's left and right RCA inputs. The low-level signal can be sent from the source unit's RCA line-level outputs. In this case, the Input Sensitivity switch on the amp should be set to "LO". A high-level signal can come from the source unit's speaker outputs, and connected to the amplifier using the Kicker KISL adapters. The Input Level switch should be set to "HI".

Fail-Safe Integration Technology (FIT): FIT utilizes isolated differential inputs, rejecting noise and electrical interference for the quietest operation possible. FIT also allows Kicker amps to accept output from nearly any factory or aftermarket head unit.


Input Level: The DXA250.1 has a two position (in/out) switch to set the input level type. It can be pressed in for High (for speaker level) or set to out for Low (for line level).

Gain: The input gain is continuously variable, labeled 0 to 11. The gain range is governed by the input level switch: 250mV to 10V for speaker level (HI) and 125mV to 5V for line level (LO). A small screwdriver is needed to adjust the gain.

Crossover Frequency: The internal low pass crossover is always active (it cannot be bypassed). The crossover point is continuously variable between 50 and 200 Hz. The slope is 12 dB/octave. A small screwdriver is needed to adjust the crossover frequency.

KickEQ Bass Boost: The KickEQ bass boost circuit provides a signal boost centered at 40 Hz. The bass boost is continuously variable between 0 and 12dB. A small screwdriver is needed to adjust the amount of bass boost.

Subsonic Filter: Frequencies that cannot be reproduced by the subwoofer do not become sound, but unnecessary oscillations causing distortion. These frequencies also waste amplifier power and can damage speakers. The subsonic filter removes inaudible frequencies to improve the performance of the speakers by eliminating this harmful distortion. The 24 dB/octave subsonic filter's crossover point is 25 Hz.

Optional CXARC Remote Bass Level Control: The DXA250.1 is compatible with the optional CXARC remote bass level control which allows you to remotely control the output level of the amplifier. The CXARC's control knob can be mounted near the driver's seat of your vehicle, while the control's 19.5' cable is extended to the amplifier location.


Wiring Recommendations: Kicker recommends that the amplifier be connected to the vehicle's battery using 8 Gauge power and ground wiring. An external 40 amp fuse should be installed on the power wire within 18" of the battery. There are no fuses included or built into the amplifier.

Kicker Extended Warranty Offer: Kicker will extend the amp's standard warranty by an additional year (for a total warranty of three years) when it is installed with a qualifying Kicker amplifier installation kit. Kicker recommends the PK8, CK8, and ZCK84 wiring kits for this amp. The amplifier and installation kit must be purchased from an authorized Kicker dealer.


Left Side of Amplifier: The DXA250.1 has terminal strips for connecting the power and speaker wires. For a clean, secure installation, ring terminals and/or spade connectors should be used. A flat head or Phillips head screwdriver (not supplied) is required to tighten/loosen the terminals. The amp's connections are as follows:

  • GND (ground): Terminal will accept a ring terminal or spade connector up to 1/2" wide. 8 gauge ground wire is recommended.
  • REM (remote turn-on): Terminal will accept a connector up to 5/16" wide. 18 gauge is recommended
  • +12V (power): Terminal will accept a ring terminal or spade connector up to 1/2" wide. 8 gauge power wire is recommended.
  • Speaker Outputs: Terminals accept spade connectors up to 5/16" wide. There are terminals for two subwoofers, internally wired in parallel.

Right Side of Amplifier:

  • RCA Inputs: one pair of RCA jacks, used for line level or speaker level inputs with KISL
  • RCA Outputs: one pair of RCA outputs; useful for adding another amp
  • Remote Bass: 3.5mm jack (mini-jack) for use with the optional CXARC remote bass level control

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Customer Q&A

Crutchfield asked: Why did you buy this?
otis said i needed it [ Opie  Aug 06, 2018 ]
Per conversation with the tech adviser it will work with the subwoofer I purchased from Crutchfield without overpowering the sub. The connection advise from the tech was absolutely necessary and well needed! Crutchfield is the BEST!!!!!! [ A  May 14, 2018 ]
Great brand and Daisy recommended it so it must be good! Can't go wrong with Kicker [ Michael  Mar 16, 2018 ]
This amp is sized perfect for the sub I purchased, and I like the overall design. [ Michael  Nov 24, 2017 ]
I chose this item to power my JL Audio ZR800-CW. The factory Head Unit wattage isn't cutting it. [ Kevin  Feb 06, 2017 ]
Tech support suggested this as being compatible with my system requirements. [ JASON  Oct 16, 2016 ]
Planning to run 1 small 10" sub, and this compact amp fits the bill [ Nolan  Sep 08, 2016 ]
Looking to add a little more power to my sub. [ Alex  Jul 21, 2016 ]

1 question already asked

If I bridge two subs on this amp, does that mean each sub will get 125 watts rms? Might be a dumb question.
[ Jeffro Slick  Feb 08, 2018 ]
1 answer
If you wired two subwoofers together (at 2-ohm impedance) to the Kicker 43DXA250.1 amplifier, then each sub would receive 125 watts RMS. For more details or to discuss further, please contact an Advisor directly by phone (888.955.6000) or online chat. Thanks!
[ Larry  Feb 17, 2018 ]  Staff

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