50W x 4 @ 4Ω

MX-Series 4-Channel Class-D Marine-Grade Amplifier, 70-Watts x 4ch @ 2-Ohm or 50-Watts x 4ch @ 4-Ohm Engineered specifically for powersports applications, the 4-channel MX280/4 amplifier employs JL's high-speed NexD™ switching design to deliver plenty of clean power, without straining charging systems. Its tiny, cast aluminum chassis is highly resistant to corrosion, with an IPX7 water-resistance rating, making it perfect for motorcycles, ATV’s or other utility vehicles. Generating a solid 50W x 4 into 4 ohms (14.4V, 1% THD), the MX280/4 is fully bridgeable, so it can be used as a 3-channel amplifier, or as a 2-channel amplifier producing a potent 140W x 2 into 4 ohms. Other features include independent front and rear crossovers with selectable full-range, high-pass or low-pass filter controls and a dual-range input section that accepts a wide range of input voltage levels, from line-level all the way to high-power speaker level signals. This amplifier features a black powder-coated finish, a gasketed cover for the controls and stainless steel hardware for durability. Specifications Frequency Response 20 Hz - 20 kHz (+0, -1dB) S/N Ratio, referred to highest rated power >89.5 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth) S/N Ratio, referred to 1 W >68 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth) Damping Factor @ 4 Ω >60 / 50 Hz Damping Factor @ 2 Ω >30 / 50 Hz THD+N @ Rated Power <1% @ 2 Ω per Ch. Input Voltage Range @ RCA Inputs Switchable from 250 mV - 4 V RMS (Low) to 750 mV - 15 V RMS (High) Min.Copper Power / Ground Wire Gauge 8 AWG wire Fuse Rating 35 A (AFS, AGU or MaxiFuse™) @ 4 Ω 50 W RMS x 4 @ 2 Ω 70 W RMS x 4 Bridged @ 4Ω 140 W RMS x 2 JL Audio MX280/4 Manual

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4-Channel Amplifier with Automatic DSP and Built-In EQ/Processor, 50-Watts RMS @ 4-Ohms x 4ch Kicker KEY series amplifiers use a powerful internal computer to deliver dramatic improvements in realism and soundstage. A massive 40-band equalizer improves tonality, and a 24dB crossover re-defines the capabilities of each speaker. The KEY200.4 delivers 200 watts RMS of power to your speakers. Measuring less than eight inches long and only two inches high, the KEY200.4 fits nearly anywhere. Mount it behind your radio, under the seat, or in your trunk with ease.  If the temperature reaches the threshold, the Kicker KEY200.4's dynamic power-management algorithms kick into gear! Instead of hearing the amplifier's volume “pumping” or blowing a fuse – KEY technology engages a nearly inaudible limiter/compressor, applied only to the peaks of the music for as little as milliseconds at a time. The amplifier quickly cools, which deactivates the compressor. Music returns to its full dynamic range without a moment’s interruption! Specifications Power (watts/ch), 4 Ohm stereo 50 x 4 Microphone/Kicker EQ button included Standard dimensions(H x W x L) 1-11/16 x 2-3/4 x 7-3/8 Metric dimensions(H x W x L) 4.3 x 7 x18.7 Frequency Response (Hz): 20-20k, +0/-1dB Input Sensitivity: high level 250mV-10V Signal-to-Noise Ratio: >90dB, a-weighted, re: rated power Active Crossover: 24dB/octave, selective high pass or all pass @60,80, or 120Hz What's in the Box: 1 - 4 channel power amplifier1 - microphone1 - microphone cable with switch1 - fuse holder1 - manual and installation hardware Kicker 47KEY2004 Manual

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