JL Audio JLA-010-03324-00 MX300/1 Marine Amplifier - Monoblock Wide-Range Amplifier

JL Audio JLA-010-03324-00 MX300/1 Marine Amplifier - Monoblock Wide-Range Amplifier

Ultra-compact IPX7 waterproof monoblock amplifier delivering 300 watts with full-range frequency response for subwoofers or high-output speaker applications.

Product Overview

The JL Audio MX300/1 Marine Amplifier (JLA-010-03324-00) delivers 300 watts of versatile monoblock power with full IPX7 waterproof protection in the most compact chassis available. This Class D monoblock amplifier features wide-range frequency response (20 Hz-20 kHz), making it suitable for both subwoofer and high-output full-range speaker applications in marine and powersports environments. The ultra-compact dimensions (8.66" x 1.77" x 3.09") enable installation in locations impossible for conventional amplifiers, while the IPX7 rating ensures complete protection against water immersion up to 1 meter for 30 minutes. Delivering 300 watts at 2 ohms or 160 watts at 4 ohms, this amplifier provides substantial power for single or dual subwoofer installations, or for driving high-output marine tower speakers in demanding outdoor environments. Built-in low-pass filter (40-400 Hz range), bass boost control, and optional remote level adjustment enable precise system tuning. The lightweight design (3.18 lbs), reduced electrical requirements (8 AWG wiring, 30A fuse), and pigtail connection system ensure simplified installation while maintaining waterproof integrity in harsh saltwater conditions.

Features & Benefits

The 300-watt monoblock configuration delivers 300 watts RMS at 2 ohms (250W at 12.5V input) or 160 watts at 4 ohms, providing substantial power for marine subwoofers or high-efficiency tower speakers. Full IPX7 waterproof rating protects against complete water immersion, far exceeding splash-resistant ratings, ensuring reliable operation even when fully submerged temporarily during washdowns, heavy weather, or water sports activities. Wide-range frequency response (20 Hz-20 kHz) extends beyond typical subwoofer amplifiers, enabling use with full-range speakers or subwoofers without bandwidth limitations. Ultra-compact dimensions (8.66" x 1.77" x 3.09") make this the smallest monoblock marine amplifier available, enabling installation behind dash panels, under seats, in storage compartments, or directly exposed in engine bays. Class D efficiency minimizes heat generation, eliminating the need for bulky heatsinks or active cooling. Built-in 12 dB/octave low-pass filter with adjustable frequency range (40-400 Hz) enables precise crossover tuning for subwoofer integration. Bass boost control provides 0 to +12 dB gain at 43 Hz for enhanced low-end impact. Optional RBC-1 remote bass control allows cockpit-accessible level adjustment. Reduced electrical requirements with 8 AWG wiring and 30A fuse simplify installation compared to higher-power amplifiers. Strong damping factor (>120 @ 4Ω) ensures tight control over driver movement. Power and signal connections via pigtail design with no exposed terminals enhance waterproofing integrity.

Technical Specifications

Compatible With / Goes Well With

JL Audio Marine Subwoofers: M3 Marine Subwoofer models, ideal for single 10-inch or 12-inch marine subwoofer installations in sealed or ported enclosures

JL Audio Marine Speakers: M3 Marine Speakers, M3 Enclosed Tower Speakers when used as high-power full-range amplifier with wide bandwidth capability

JL Audio Source Units: MediaMaster 55 Stereo, MediaMaster 105 Stereo, JL Audio Receivers for signal source and subwoofer output

Powersports Applications: Polaris RZR Stealthbox systems (SB-POL-RZG3/10TW3), compatible with UTV, ATV, and side-by-side subwoofer applications

System Components: Optional RBC-1 Remote Bass Control for cockpit-accessible level adjustment, pair with MX280/4 or MX600/3 for complete system amplification

Installation Requirements: 8 AWG copper power and ground wiring, 30A fuse (AFS/AGU/MaxiFuse), 2-ohm stable subwoofer for maximum power output, sealed or ported enclosure matched to amplifier power

Frequently Asked Questions

What makes this a "wide-range" monoblock compared to typical subwoofer amplifiers? The 20 Hz-20 kHz frequency response extends far beyond typical subwoofer amplifiers that roll off around 500 Hz or lower. This wide bandwidth enables use with full-range speakers requiring high power output, such as marine tower speakers or high-efficiency marine coaxials, not just subwoofers. The low-pass filter can be bypassed entirely when powering full-range speakers, making this a versatile monoblock for various applications where standard subwoofer amplifiers would be bandwidth-limited.

Can this amplifier power two marine subwoofers effectively? Yes, wire two 4-ohm subwoofers in parallel for a 2-ohm load delivering 300W total, or two 2-ohm subs in series for 4 ohms and 160W. For dual 10-inch marine subwoofers, 300 watts provides solid output in space-constrained installations. Ensure combined power handling exceeds amplifier output and that each subwoofer can handle its share of divided power. For maximum output with dual subs, consider the MX500/1 which delivers 500W at 2 ohms.

Why would I choose the MX300/1 over the more powerful MX500/1? The MX300/1 offers the smallest footprint in the MX monoblock line (8.66" width vs 9.33"), lighter electrical requirements (8 AWG/30A vs 4 AWG/50A fuse), and full 20 Hz-20 kHz bandwidth compared to the MX500/1's 20 Hz-12 kHz response. Choose the MX300/1 for tight installation spaces, lighter electrical system loads, or when the extended high-frequency response is needed for full-range speaker applications. The 300W output suffices for most single-subwoofer marine installations.

Where can I mount this amplifier with its IPX7 rating? The IPX7 rating allows mounting virtually anywhere including fully exposed locations. Common installations include directly on bulkheads in engine compartments, underneath seats in UTVs, behind access panels in boats, on roll bars in side-by-sides, or in storage compartments. The ultra-compact dimensions fit locations where larger amplifiers won't. The pigtail connection design maintains waterproof integrity even when mounted in locations subject to direct water exposure during cleaning or weather.

How does the optional RBC-1 remote control enhance system usability? The RBC-1 remote bass control mounts in the cockpit or helm area, providing convenient subwoofer level adjustment without accessing the amplifier. This is particularly valuable in marine and powersports applications where the amplifier is mounted in inaccessible locations. Adjust bass output on the fly to compensate for passenger load, water conditions, speed, or music genre. The remote connects via a simple cable and maintains the amplifier's waterproof integrity when properly installed.