Mobile Electronics Power Accessories

Kicker

1250.1 Mono Subwoofer Amplifier

$599.99

SKU: 51LX12501

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Kicker 51LX1250.1 is a mono subwoofer amplifier designed for powerful bass and flexible system control. It delivers 1250 watts RMS x 1 at 1 ohm, 750 watts RMS x 1 at 2 ohms, and 400 watts RMS x 1 at 4 ohms.

This Class D amplifier features customizable low-frequency signal processing, including variable low-pass and subsonic filters. It also includes KickEQ+ parametric bass boost and a SHOCwave2.0 digital bass restoration algorithm. The amplifier integrates easily with factory systems using Kicker's FIT+ technology and comes with speaker-level input adapters.
Show original supplier description
It features a robust Class D design for increased efficiency and lower operating temperatures. The amplifier offers substantial power output, delivering 1250 watts RMS x 1 at 1 ohm, 750 watts RMS x 1 at 2 ohms, and 400 watts RMS x 1 at 4 ohms. This amplifier is equipped with advanced sound-shaping capabilities. It includes variable low-pass (40-160 Hz, 24 dB/octave) and subsonic (10-80 Hz, 24 dB/octave) crossover filters, along with a KickEQ+ parametric bass boost (0-6 dB, variable center 20-80 Hz, 1-5 bandwidth) to optimize bass response. For enhanced low-frequency content, it features Kicker's SHOCwave2.0™ digital bass restoration algorithm. The gain control includes a clip light to assist in proper gain setting. Integration into factory systems is simplified by Kicker's FIT+™ technology, which accepts both low- and high-level signals (up to 40V) with differential inputs to minimize noise. Speaker wire adapters are included, and the amplifier offers various turn-on modes. The LX1250.1 also features comprehensive protections for thermal, circuit, and voltage stability. Its aesthetic can be customized with a reversible center panel and 11 RGB LED accent colors. The amplifier comes with the LXRC wired remote control, allowing for fingertip adjustment of subwoofer level, control of RGB LED brightness, and a display of battery voltage. It also includes an output clipping indicator. Note that wiring, fuse, and hardware are not included; a 1/0-gauge amp wiring kit with a 100-amp fuse is recommended. The product has a 2-year warranty, which extends to 3 years when purchased with a Kicker 1/0-gauge wiring kit.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandKicker
Part Number51LX12501
CategoryMobile Electronics

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy