Amplificateur marin MX280/4 - visuel officiel 1

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JL Audio

010-03105-00

Marine amplifier MX280/4

The JL Audio MX280/4 marine amplifier is a 4-channel Class D model delivering 280 W RMS for marine audio systems. Featuring NexD™ technology and IPX7 water resistance, it provides reliable and efficient performance in demanding environments. Its independent crossovers and dual-range input offer integration flexibility. Supplied with 4 stainless steel mounting screws, 1 spare 35A fuse, and the user manual.

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253,74€

253,74€ ~~289,99€~~

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Available in stock

Free pickup point from €150 in France
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Custom installation

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Installers near you

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Support service

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Technical specifications

Amp Class	Class D
Speaker Channels	4
Audio Output Power Rms	280 W
Total power output (W)	280
Input voltage range	12V
Max power consumption	420
IP rating	IPX7
Weight	1.34 kg
Amp Bridgeable	Oui
Subwoofer Output	Yes, via bridged channels
Amplifier Type	Full range
Source type	Marine amplifier
Color	Black
Fuse Installation Distance	45
Fuse rating	35
Grounding type	Negative
Minimum Ground Wire Gauge	8
Minimum Power Wire Gauge	8
Mounting type	Area
Package contents	1 amplifier, 4 stainless steel mounting screws, 1 35A spare fuse, 1 user manual
Remote Turn On Voltage	12
IP rating	IPX7
Wired input	RCA (Audio/Video)

Detailed description

The JL Audio MX280/4 marine amplifier is a four-channel audio solution designed for marine environments and power sports. This Class D amplifier delivers a continuous RMS power output of 50 W x 4 at 4 ohms or 70 W x 4 at 2 ohms at 14.4 V. In bridged mode, it provides 140 W RMS x 2 at 4 ohms at 14.4 V. At 12.5 V, the power output is 36 W RMS x 4 at 4 ohms, 52 W RMS x 4 at 2 ohms, or 100 W RMS x 2 bridged at 4 ohms.

Design and Durability

Featuring JL Audio’s high-speed switching NexD™ technology, this amplifier delivers efficient power without overloading the vehicle or vessel’s charging systems. Its compact die-cast aluminum chassis is engineered for high corrosion resistance. It carries an IPX7 waterproof rating, capable of withstanding immersion up to 1 meter for 30 minutes and powerful water jets. The construction includes a durable powder-coated finish, a sealed control cover, and stainless-steel hardware, ensuring enhanced durability in marine environments.

Advanced Audio Features

The MX280/4 offers a frequency response from 20 Hz to 20 kHz (+0, -1 dB) and a signal-to-noise ratio exceeding 89.5 dB. It features independent front and rear crossovers configurable as full-range, high-pass, or low-pass filters with a 12 dB/octave slope and adjustable frequency from 35 to 300 Hz. The dual-range input section accepts RCA signal voltages from 250 mV to 4 V RMS (low) or 750 mV to 15 V RMS (high), allowing flexible integration with various audio sources. The amplifier can be configured in 4-channel, 3-channel, or 2-channel bridged modes, providing versatility for different sound system architectures.

Documentation

Type	Nom
	Manuel utilisateur - Manuel d'utilisation Amplificateur marin JL Audio MX280/4 (EN)

Expert opinion

« JL Audio MX280/4: The compact and rugged marine amplifier »

The JL Audio MX280/4 amplifier is a top choice for sound systems in marine and motor sports environments where compactness and ruggedness are critical. Its Class D design with NexD™ technology delivers exceptional energy efficiency, reducing the load on the boat’s electrical system—a significant advantage for standalone installations or setups with limited charging capacity.

This amplifier integrates easily thanks to its dual-range input section, accepting both preamp-level signals (RCA) and high-level signals (speaker). This flexibility allows it to work with a wide range of existing audio sources without requiring complex adapters. The independent and adjustable crossovers enable precise tuning of the frequency response, essential for optimizing sound quality with different speaker types and configurations.

A key feature is its IPX7 rating, ensuring protection against temporary immersion and heavy water spray. This makes it particularly suitable for open-cockpit installations, central consoles, or off-road vehicles where exposure to the elements is unavoidable. However, while it is water-resistant, it is still recommended to mount it in a dry, well-ventilated location if possible, or at least shielded from direct splashes and extreme temperatures, such as in an engine compartment.

The MX280/4 is ideal for small to medium installations requiring clean, reliable amplification without excessive bulk. Its corrosion-resistant die-cast aluminum chassis and stainless-steel hardware reflect a design built for longevity in saltwater environments. It is perfectly suited for pleasure boats, RIBs, jet skis, or ATVs seeking a significant audio system upgrade without compromising reliability.

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Marine amplifier MX280/4

253,74€

253,74€ ~~289,99€~~

Frequently Asked Questions

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What type of amplifier is the JL Audio MX280/4?

The JL Audio MX280/4 is a JL Audio marine Class D four-channel amplifier, providing full-range audio reproduction.

What is the output power of the MX280/4 amplifier?

The JL Audio MX280/4 amplifier delivers an RMS power of:

70 watts x 4 channels at 2 ohms
50 watts x 4 channels at 4 ohms
140 watts x 2 channels at 4 ohms (bridged mode)

Is the JL Audio MX280/4 designed for marine use?

Yes, this amplifier is specifically designed for marine applications and motorized sports. It features a water- and element-resistant design, as indicated by its IPX7 certification.

What does the IPX7 waterproof rating mean for this amplifier?

The IPX7 certification means the amplifier has been tested to withstand immersion in water up to 1 meter deep for a maximum of 30 minutes, provided the control panel cover is properly installed. It is designed to be water-resistant but must never be submerged for long periods or exposed to high-pressure water jets.

What is Class D technology used in this amplifier?

Class D technology is an amplifier design type that offers very high efficiency, allowing the amplifier to deliver more power while consuming less energy and producing less heat. This results in a more compact and lighter amplifier, ideal for space-limited environments such as on a boat.

Can the MX280/4 amplifier power a subwoofer?

Yes, the MX280/4 amplifier can power a subwoofer using its channels in bridged mode. For example, two channels can be bridged to provide 140 watts RMS at 4 ohms to a subwoofer, while leaving the other two channels for speakers.

What is a "full-range" amplifier?

A full-range amplifier can reproduce the entire audio frequency spectrum, from deep bass to crystal-clear highs. This means it can power midrange/tweeter speakers or subwoofers, offering maximum flexibility for your audio system setup.

Which items are included in the MX280/4 amplifier packaging?

The JL Audio MX280/4 amplifier package contains:

An amplifierFour stainless steel mounting screwsOne 35A spare fuseOne user manual

What are the power supply requirements for the JL Audio MX280/4?

This amplifier is designed to operate with 12-volt negative-ground electrical systems. Using the product with positive ground or voltages other than 12V may damage the product.

What is the minimum required power and ground cable size?

The minimum recommended gauge for the power cable (positive +12V) and ground cable (negative) for this amplifier is 8 AWG.

What type of fuse is required for the MX280/4 amplifier and where should it be installed?

A 35A fuse is required for the safety of the vehicle or vessel. This fuse must be installed on the main power cable, within 45 cm (18 inches) of the battery's positive terminal.

What are the recommendations for mounting the amplifier?

The amplifier should be installed in a dry, well-ventilated location that does not interfere with other electronic devices. If a dry environment is not available, a location not exposed to heavy spray may be used. Never install it underwater, in the engine compartment, or in areas of extreme heat. The amplifier must be securely fastened to prevent detachment.

Does the MX280/4 amplifier accept both low-level (RCA) and high-level (speaker) inputs?

Yes, the JL Audio MX280/4 amplifier accepts both input types:

Low-level input: Via RCA jacks for source units with preamplified outputs.High-level input: By directly connecting the source unit’s speaker wires, optionally via an RCA-to-speaker-wire adapter.

How should I connect the remote turn-on wire?

The remote start wire (blue) must be connected to the positive remote start output (+12V) of your source unit. If your source unit has no dedicated output, it can be connected to an ignition-switched circuit via a switch.

What audio filter settings are available on this amplifier?

The amplifier provides filter settings for each pair of channels:

Off: Full-band operation.HP (High-Pass): Configures the filter to attenuate frequencies below the selected cutoff frequency.LP (Low-Pass): Configures the filter to attenuate frequencies above the selected cutoff frequency.The filter cutoff frequency is adjustable from 35 to 300 Hz, with a slope of 12 dB/octave.

How to adjust the input sensitivity of the MX280/4 amplifier?

Input sensitivity can be adjusted based on the signal level of your source unit:

For low-level inputs (RCA/preamp): The range is 250 mV to 4 V. For high-level inputs (RCA/speaker): The range is 750 mV to 15 V. These settings allow the amplifier to match the output of your audio source for optimal performance.

Is it possible to bond channels on the MX280/4 for more power?

Yes, it is possible to bridge the channels of the MX280/4 amplifier. In bridged mode, two channels can be combined to provide higher power to a single speaker or subwoofer, delivering up to 140 watts RMS x 2 at 4 ohms.

Is the MX280/4 amplifier compatible with OEM car radios that lack RCA outputs?

Yes, the MX280/4 amplifier is compatible with OEM car radios lacking RCA outputs thanks to its high-level inputs. You can connect the speaker output wires from your car radio directly to the amplifier’s inputs, possibly via an adapter if needed.

Which actions or conditions may void the warranty of my JL Audio MX280/4 amplifier?

Your amplifier warranty may be voided if the product is used under the following conditions:

In electrical systems with positive ground or voltages other than 12V.
In aircraft (not certified for this use).
If submerged underwater for extended periods or exposed to high-pressure water jets.
It is essential to follow the installation and safety instructions in the manual to maintain warranty validity.