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Key Specs
Continuous Watts x Channel @ Ohms: 400 x 1
Maximum Watts x Channel @ Ohms: 400W x 1 x 2 ohms (This is the maximum load the speaker, subwoofer or amp can drive.)
Amplifier Class: D (An amplifier's mode of operation, specifically the conditions in which its electrical current flows for the duration of an audio signal, determines its class. Each class has its strengths and weaknesses when it comes to power efficiency, levels of crossover distortion, and overall sound quality.)
Number Of Channels: 1
Bass Boost: Variable (Circuitry that boosts the bass response of the amplifier, improving audio reproduction enhancing the sound of low frequencies. Fixed boost means the level of bass response is preset, whereas variable boost allows the user to make adjustments.)
Bridgeable: false (Bridging an amplifier increases the power it supplies to the speaker(s).)
Speaker-Level Inputs: true (Also referred to as high-level inputs. Enables the amplifier to receive a sound signal from another device that does not have RCA, or low-level, inputs.)
General
Brand: KICKER
Model Number: 40KX4001
Product Name: KX Series 400W Class D Mono Amplifier with Built-in Crossovers
Color: Silver
Mounting Hardware Included: true
Audio Power
Continuous Watts x Channel @ Ohms: 400 x 1
Maximum Watts x Channel @ Ohms: 400W x 1 x 2 ohms (This is the maximum load the speaker, subwoofer or amp can drive.)
Amplifier Class: D (An amplifier's mode of operation, specifically the conditions in which its electrical current flows for the duration of an audio signal, determines its class. Each class has its strengths and weaknesses when it comes to power efficiency, levels of crossover distortion, and overall sound quality.)
Audio
Number Of Channels: 1
Signal-to-Noise Ratio (SNR): 95 decibels (The ratio of the desired signal's strength to the level of background noise. A ratio higher than 1:1, which equates to greater than 0 decibels, indicates more signal than noise.)
Bass Boost: Variable (Circuitry that boosts the bass response of the amplifier, improving audio reproduction enhancing the sound of low frequencies. Fixed boost means the level of bass response is preset, whereas variable boost allows the user to make adjustments.)
Features
Bridgeable: false (Bridging an amplifier increases the power it supplies to the speaker(s).)
MOSFET Power Supply: false (A specific type of power supply with the advantages of high switching speed and efficiency at low voltages.)
Input
Line-Level Inputs: true (Also referred to as low-level inputs. Enables the amplifier to receive a sound signal from another device via RCA cables.)
Speaker-Level Inputs: true (Also referred to as high-level inputs. Enables the amplifier to receive a sound signal from another device that does not have RCA, or low-level, inputs.)
Dimensions
Product Height: 2.19 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
Product Width: 8 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
Product Depth: 8.94 inches (The out of box depth of the item. Depth is measured as the distance from the front of the item to the back as it would be primarily used or placed.)
Product Weight: 5.8 pounds (The out of box weight of the item.)
Warranty
Warranty - Parts: 2 years
Warranty - Labor: 2 years limited
Other
UPC: 713034065814
Enjoy high-quality sound with this Kicker KX Series 40KX4001 400W Class D mono amplifier that features FIT (Fail-Safe Integration Technology), which accepts audio from most outputs. Remote bass control simplifies operation.
Geek Squad® installation: is strongly recommended for this product. Please visit your local Best Buy store for details.
Handles up to 200W RMS (continuous) @ 4 ohms or 400W RMS @ 2 ohms: For powerful sound.
Variable high-pass subsonic and low-pass crossovers: Ensure flexible operation.
FIT (Fail-Safe Integration Technology): Accepts output from most sources while providing optimal noise rejection.
Adjustable KickEQ: Allows you to easily customize the sound.
DC offset, 12V remote and audio auto turn-on modes: Offer versatility.
Angled, custom-tooled power connectors: Enable easy connection. Compact footprint simplifies installation in small spaces.
Magnetic panels: Cover the controls to add a touch of style.
Remote bass control: For ease of use.
Whats Included
Kicker KX Series 400W Class D Mono Amplifier with Built-in Crossovers
Mounting hardware
Owner's manual
Customers are saying
Customers are delighted by the great sound quality of the KX Series 400W Class D Mono Amplifier. Customers report that it sounds great, produces no distortion, and hits hard.
This summary was generated by AI based on customer reviews.
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Rated 5 out of 5 stars
Great power for the size
I love this amp. It has all the power I need and fits conveniently under my back seat. I have it powering a single 10" Kicker CVR and it hits very hard. I am very happy that Kicker included the remote with this as that had been an additional purchase on the last four amplifiers I've purchased, 3 other Kickers and 1 JL. If your looking for a great mono-amp, this is it.
Posted by Dane
Rated 5 out of 5 stars
Perfect match for CompR12
This is powering a Kicker single 12" compR enclosure... Was the best match, power wise, in the kicker line for this sub. Sounds great, no distortion, and it hits hard. The remote volume control is very nice. Dial in the bass on the fly from song to song.
Posted by BenzKompressor
Rated 5 out of 5 stars
Kicker 400W amp
This Kicker 400W amp produces great sound and looks good while doing it. The red light bar across the face of the amp looks sinister mounted in the trunk of my car. I recommend this product to anyone looking to add bass to a factory stereo.