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JL Audio

JL Audio MX500/4 MX Series 4-Channel Powersport Amplifier - 125W RMS x 4

$879.99
SKU: MX500/4
UPC: 699440984089
Condition: New
Availability: Special Order - Usually Ships in 3-5 Days
Shipping: Calculated at Checkout
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Descriptions

About: JL Audio MX500/4 MX Series 4-Channel Powersport Amplifier - 125W RMS x 4

PLAY ANYWHERE

With efficient NexD™ technology and a water-resistant chassis, MX amplifiers produce loads of clean power and are ideal for applications where moisture cannot be completely avoided.

  • DESIGNED FOR LIMITED SPACE APPLICATIONS
  • SHOCK-RESISTANT, WATER-RESISTANT AND BUILT TOUGH
  • EFFICIENT DESIGN FOR HIGH OUTPUT USES LESS ENERGY
  • COMPLETE SIGNAL PROCESSING SECTIONS ON BOARD
  • EXCEEDS INTERNATIONAL STANDARDS FOR SALT FOG AND UV EXPOSURE

POWER TO GO ANYWHERE

Housed in a tiny cast-aluminum chassis, MX amps are rugged, water-resistant (IPX7-rated) and ready to go where conventional amplifiers wouldn’t dare.

NexD ADVANTAGE

The highly efficient Class-D design reduces current draw and heat while generating loads of high-fidelity sound without straining small charging systems.

COMPLETE SIGNAL PROCESSING

For easy setup and system flexibility, a complete set of onboard filters and signal processing features is concealed behind every MX amplifier’s water-resistant control cover.

DIFFERENTIAL-BALANCED INPUTS

A versatile design accepts speaker level signals without a line-output converter — and delivers outstanding noise rejection while preventing alternator whine and other noises.

BUILT FOR THE ELEMENTS

The all-aluminum, powder-coated housing with marine-grade hardware inhibits corrosion, and a water-resistant security cover protects all controls from the harshest of seasons.

FULL-RANGE STEREO

These amplifiers offer two 4-channel models with 280 and 500 watts.

SYSTEM AMPLIFIER

It’s a tiny 600-watt powerhouse with 2 full-range outputs plus a subwoofer output.

MONOBLOCK

Two models are available with 300 and 500 watts.

Specifications:

  • Channels: Monoblock/3/4
  • Physical dimensions (Height): 1.77" (45 mm)
  • Physical dimensions (Width):
    • Monoblock (300 W)/4-Channel (280 W): 8.66" (220 mm)
    • Monoblock (500 W)/3/4-Channel (500 W): 9.33" (237 mm)
  • Physical dimensions (Depth):
    • Monoblock (300 W)/4-Channel (280 W): 3.09" (78.5 mm)
    • Monoblock (500 W )/3/4-Channel (500 W): 4.50" (115 mm)
  • Weight: 3.18 lbs (1.44 kg)
  • Operating voltage 11-15 VDC
  • Water and dust rating IPX7

Audio:

  • Amplifier class: Class D
  • Rated continuous (RMS) power (14.4 V input @ 4 Ohm < 1% THD):
    • Monoblock (300 W): 160 W x 1
    • Monoblock (500 W): 300 W x 1
    • 3-Channel: Main: 75 W x 2/Sub: 250 W x 1
    • 4-Channel (280 W): 50 W x 4/140 W x 2 (Bridged)
    • 4-Channel (500 W): 70 W x 4/250 W x 2 (Bridged)
  • Rated continuous (RMS) power (14.4 V input @ 2 Ohm < 1% THD):
    • Monoblock (300 W): 300 W x 1
    • Monoblock (500 W): 500 W x 1
    • 3-Channel: Main: 100 W x 2/Sub: 400 W x 1
    • 4-Channel (280 W): 70 W x 4
    • 4-Channel (500 W): 125 W x 4
  • Rated continuous (RMS) power (12.5 V input @ 4 Ohm < 1% THD):
    • Monoblock (300 W): 160 W x 1
    • Monoblock (500 W): 250 W x 1
    • 3-Channel: Main: 50 W x 2/Sub: 200 W x 1
    • 4-Channel (280 W): 36 W x 4/100 W x 2 (Bridged)
    • 4-Channel (500 W): 55 W x 4/180 W x 2 (Bridged)
  • Rated continuous (RMS) power (12.5 V input @ 2 Ohm < 1% THD):
    • Monoblock (300 W): 250 W x 1
    • Monoblock (500 W): 400 W x 1
    • 3-Channel: Main: 80 W x 2/Sub: 300 W x 1
    • 4-Channel (280 W): 52 W x 4
    • 4-Channel (500 W): 90 W x 4
  • Signal-to-Noise Ratio, referred to highest rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs:
    • Monoblock (300 W): > 85 dB
    • Monoblock (500 W): > 97 dB
    • 4-Channel (280 W): > 89.5 dB
    • 4-Channel (500 W): > 88 dB
  • Signal-to-Noise Ratio, referred to highest rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs - Main Channels 3-Channel: > 88 dB
  • Signal-to-Noise Ratio, referred to highest rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs - Subwoofer Channel 3-Channel: > 88 dB
  • Signal-to-Noise Ratio, referred to 1 W (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs:
    • Monoblock (300 W): > 64 dB
    • Monoblock (500 W): > 70 dB
    • 4-Channel (280 W): > 68 dB
    • 4-Channel (500 W): > 70.5 dB
  • Signal-to-Noise Ratio, referred to 1 W (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs - Main Channels 3-Channel: > 68 dB
  • Signal-to-Noise Ratio, referred to 1 W (A-weighted, 20 Hz - 20 kHz noise bandwidth): Analog Inputs - Subwoofer Channel 3-Channel: > 68 dB
  • Damping factor @ 4 Ω:
    • Monoblock (300 W): > 120/50 Hz
    • Monoblock (500 W): > 115/50 Hz
    • 4-Channel (280 W): > 60/50 Hz
    • 4-Channel (500 W): > 92/50 Hz
  • Damping factor @ 2 Ω:
    • Monoblock (300 W): > 75/50 Hz
    • Monoblock (500 W): > 54/50 Hz
    • 4-Channel (280 W): > 30/50 Hz
    • 4-Channel (500 W): > 43/50 Hz
  • THD+N @ Rated Power Monoblock (300 W/500 W)/4-Channel (280 W): <1% @ 2 Ω per Channel
  • THD+N @ Rated Power: Main Channels <1% @ 2 Ω per Channel
  • THD+N @ Rated Power: Subwoofer Channel <1% @ 2 Ω per Channel
  • Frequency response (+0, -1dB):
    • Monoblock (300 W)/3/4-Channel (280 W/500 W): 20 Hz-20 kHz
    • Monoblock (500 W): 20 Hz-12 kHz
  • Input voltage range @ RCA inputs:
    • Monoblock (500 W)/3-Channel: Switchable from 250 mV-4 V RMS (Low) to 580 mV-14 V RMS (High)
    • Monoblock (300 W)/4-Channel (280 W/500 W): Switchable from 250 mV-4 V RMS (Low) to 750 mV-15 V RMS (High)
  • Fuse rating:
    • Monoblock (300 W): 30 A
    • Monoblock (500 W)/4-Channel (500 W): 50 A
    • 3-Channel: 60 A
    • 4-Channel (280 W): 35 A
  • Recommended fuse type(s) AFS, AGU or MaxiFuse™
  • Min. copper power/Ground wire gauge:
    • Monoblock (300 W)/4-Channel (280 W): 8 AWG wire
    • Monoblock (500 W)/3/4-Channel (500 W): 4 AWG wire

Signal Processing:

  • Filter mode(s): Channels 1 & 2:
    • Monoblock (300 W/500 W): Off or Low-Pass only
    • 3/4-Channel (280 W/500W): Off, Low-Pass or High-Pass
  • Filter Slope(s): Channels 1 & 2:
    • Monoblock (300 W)/4-Channel (280 W/500 W): 12 dB/octave
    • Monoblock (500 W): 24 dB/octave
  • Filter frequency range: Channels 1 & 2:
    • Monoblock (300 W): 40 Hz-400 Hz
    • 4-Channel (280 W/500 W): 35 Hz-300 Hz
  • Filter mode(s): Channels 3 & 4 4-Channel (280 W/500 W): Off, Low-Pass or High-Pass
  • Filter Slope(s): Channels 3 & 4 4-Channel (280 W/500 W): 12 dB/octave
  • Filter frequency range: Channels 3 & 4 4-Channel (280 W/500 W): 35 Hz-300 Hz
  • Filter mode(s): Subwoofer Channel 3-Channel: Off or Low-Pass only
  • Filter slope(s): Subwoofer Channel 3-Channel: 12 dB/octave
  • Filter frequency range: Subwoofer Channel 3-Channel: 40 Hz-400 Hz
  • Bass boost EQ (0 to +12 dB @ 45 Hz) Monoblock (300 W/500 W): 0 to +12 dB @ 43 Hz
  • Detented, calibrated filter frequent potentiometers
  • Remote level control Monoblock (300 W/500 W)/3-Channel: Optional (RBC-1)
  • Channel input mode switch:
    • 3-Channel: yes (2/4 Channels)
    • 4-Channel (280 W/500 W): yes (2/3/4 Channels)
  • Output polarity switch Monoblock (300 W/500 W)/3-Channel: yes

What's in the Box:

  • MX amplifier with power/signal pigtails
  • Four 1-inch self-tapping screws

Most products include a limited one year manufacturer’s warranty covering defects in materials and workmanship under normal use. Warranty coverage does not apply to improper installation, misuse, or damage caused by operation outside manufacturer specifications. For complete warranty terms, exclusions, and claim procedures, please visit our full Warranty Policy page.

Most products include a limited one year manufacturer’s warranty covering defects in materials and workmanship under normal use. Warranty coverage does not apply to improper installation, misuse, or damage caused by operation outside manufacturer specifications. For complete warranty terms, exclusions, and claim procedures, please visit our full Warranty Policy page.

Fast shipping across Canada from our Toronto warehouse. Most orders ship within 1–2 business days. Shipping costs and delivery estimates are calculated at checkout. Returns are accepted on eligible items that are unused and in original packaging within our return period. For full details, please view our Shipping Policy and Returns & Exchanges Policy.

Please note that final sale, clearance, open-box, and refurbished items are not eligible for returns or refunds. These items may only be covered under their respective warranty or exchange terms where applicable. For full details regarding open-box items, please review our Open Box Policy.

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