JL Audio® MHD Marine Amplifier
JL Audio® MHD Marine Amplifier
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JL Audio® MHD Marine Amplifier
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“Installed the Fusion Apollo system and wow — crystal clear even at full throttle. Couldn’t believe the difference after upgrading from my old Clarion.”
Nick J. — Gold Coast, QLD -
“The JL Audio speakers are insane. Deep bass, no distortion, even with wind and waves. Sounds like a concert on water.”
Sarah W. — Mandurah, WA -
“Went for the Signature Series 3i setup — absolute top-shelf sound. Easy to install and looks stunning on the white dash.”
Dylan K. — Cairns, QLD
JL Audio® MHD Marine Amplifier – Monoblock Wide-Range Marine Amplifier (750W)
The JL Audio® MHD Marine Amplifier sets a new standard for high-power audio in marine environments. Featuring cutting-edge Single Cycle Control™ and R.I.P.S.™ power supply technologies, it delivers world-class audio fidelity and high-power output in an incredibly compact design. The 750W monoblock amplifier offers exceptional sound performance with minimal space requirements, perfect for high-performance boat audio systems.
UNMATCHED AUDIO PERFORMANCE & INNOVATIVE TECHNOLOGY
This amplifier's Class D design delivers superb sonic performance, and its unique power management system ensures optimal performance at all times, preventing thermal issues while maintaining consistent sound quality. The JL Audio® MHD amplifier is perfect for boat owners who demand high-fidelity sound without compromising on space or reliability.
KEY FEATURES
- Single Cycle Control™: Provides exceptional audio quality with reduced current draw and heat, applying output correction over 400,000 times per second.
- R.I.P.S.™ Technology: Intelligent power supply maintains full power output from 1.5 to 4 ohms per channel, ensuring efficiency and performance.
- Studio-Grade Signal Processing: Features selectable filters (12 dB/octave or 24 dB/octave) with calibrated potentiometer for seamless integration with subwoofers and components.
- Advanced Rollback Protection: Innovative circuit design ensures the amplifier continues to operate, even under extreme conditions, preventing thermal shutdown.
BUILT FOR MARINE ENVIRONMENTS
Designed with durability in mind, the JL Audio® MHD Marine Amplifier features an all-aluminum, powder-coated housing and marine-grade hardware to inhibit corrosion. It meets international standards for salt fog and UV exposure, ensuring long-lasting reliability, no matter the conditions.
- Compact and powerful design with high-efficiency Class D amplification.
- Built to withstand harsh marine environments with corrosion-resistant components.
- Enhanced thermal management prevents overheating and ensures continuous performance.
Inverell Boating Centre Expert Note:
The JL Audio® MHD Marine Amplifier provides exceptional sound quality and high-efficiency power in a compact design. Its high-fidelity Class D performance and advanced power management make it a top choice for boat owners who demand premium audio without the extra bulk. The R.I.P.S.™ technology ensures consistent output, even in extreme conditions.
Specification in detail
Specification in detail
General & Physical
PART NUMBER: 010-03320-00
CHANNELS: Monoblock, 4, 5
DIMENSIONS (H x W x D): Monoblock: 49mm x 273mm x 199mm, 5-Channel: 49mm x 273mm x 199mm
WEIGHT: Monoblock: 2.99kg, 5-Channel: 3.11kg
WARRANTY: 2 years
OPERATING VOLTAGE: Monoblock: 11-14.5 VDC, 5-Channel: 22-29 VDC
Audio Performance
RATED RMS POWER (14.4 V input @ 4 Ohm < 1% THD):
Monoblock: 750W x 1, 4-Channel: 150W x 4/300W x 2 (Bridged), 5-Channel: Main: 100W x 4/Sub: 500W x 1
PEAK POWER: Monoblock: 1100W x 1, 4-Channel: 290W x 4, 5-Channel: Main: 75W x 4/Sub: 500W x 1
SIGNAL-TO-NOISE RATIO: Monoblock: > 110 dB, 4-Channel: > 110 dB, 5-Channel: > 108.5 dB
DAMPING FACTOR @ 4 Ω: Monoblock: > 500/50 Hz, 4-Channel: > 300/50 Hz, 5-Channel: > 400/50 Hz
Protection & Safety
PROTECTION CIRCUITS: Reverse voltage, Input under/over voltage, Over temperature, Output short circuit
FUSE RATING: Monoblock/5-Channel: 60A, 4-Channel: 50A, 5-Channel (24V): 30A
RECOMMENDED FUSE TYPE: AFS, AGU, or MaxiFuse™
Inverell Boating Centre Technical Summary:
The JL Audio® MHD Marine Amplifier combines advanced technologies such as R.I.P.S.™ and Single Cycle Control™ for optimal power output and audio quality. Its compact, durable design makes it perfect for marine environments, offering high power with minimal space requirements. Whether you need a monoblock or multi-channel setup, this amplifier delivers superb sound and reliability.
Warranty / Availability of Repair Facilities & Parts
Warranty / Availability of Repair Facilities & Parts
AU Warranty / Availability of Repair Facilities & Parts
Garmin Warranty / Availability of Repair Facilities & Parts
On this page, Garmin customers in Australia will find detailed warranty information; information regarding availability of repair facilities and parts including for out-of-warranty service; other important details regarding repair or replacement of a Garmin product; and how to contact Inverell Boating Centre for further information.
On this page
- Limited Warranty
- Availability of Repair Facilities & Parts (Out of Warranty)
- Repair or Replacement of a Garmin Product
- Additional Resources
- Contact for Further Information
Limited Warranty
This warranty is provided by Garmin Australasia Pty Ltd.
Application of Australian Consumer Guarantees
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if they fail to be of acceptable quality and the failure does not amount to a major failure.
The benefits under this Limited Warranty are in addition to other rights and remedies under applicable law. Phone: 0417 159 205.
One-Year Consumer Products Limited Warranty
Non-aviation products are warranted to be free from defects in materials or workmanship for one year from the date of purchase. Within this period, Garmin Australasia will, at its sole option, repair or replace any components that fail in normal use at no charge for parts or labour (customer responsible for transportation).
Warranty Exclusions
- Cosmetic damage such as scratches, nicks, and dents.
- Consumable parts (batteries, etc.) unless damage occurs due to defects in materials or workmanship.
- Damage from accident, abuse, misuse, water, fire, or external causes.
- Service by non-authorised providers.
- Modifications or altered units without written permission.
- Damage caused by non-Garmin cables or accessories.
Garmin reserves the right to refuse warranty claims for products obtained or used in contravention of local laws. Map accuracy and completeness are not guaranteed.
Warranty Process
- Contact Inverell Boating Centre Support to request an RMA number.
Email: inverellboatingcentre.cwa@gmail.com
Phone: 0417 159 205
Provide your unit serial number, return address, and contact number.
- Ship the unit with RMA number to Garmin or Inverell Boating Centre.
INVERELL BOATING CENTRE
Attn: Warranty / Returns:
10a Swanbrook Rd,
Inverell NSW 2360,
Australia
Availability of Repair Facilities & Parts (Out of Warranty)
Garmin products include complex integrated components. Repairs of parts such as cracked screens or integrated bands may not be possible outside Garmin factory conditions. Therefore, facilities or spare parts may not always be available for repair of such components.
Where an out-of-warranty service is required, Garmin Australasia or INVERELL BOATING CENTRE may offer to sell a replacement unit or Garmin Refurbished product. This applies only to out-of-warranty service and not to consumer guarantees under the Australian Consumer Law.
Repair or Replacement of a Garmin Product
Australian Consumer Law Notice:
- Repair or replacement of goods capable of retaining user data may result in loss of that data.
- Goods presented for repair may be replaced with refurbished goods of the same type rather than repaired. Refurbished parts may be used to repair goods.
Additional Resources
- Parallel imports: accc.gov.au/buying-parallel-imports
- Proof of purchase: accc.gov.au/receipts-proof-of-purchase
- Identifying genuine business: accc.gov.au/identifying-a-genuine-business
Contact for Further Information
For all warranty or out-of-warranty enquiries, please contact:
INVERELL BOATING CENTRE
www.inverellboatingcentre.com
10a Swanbrook Rd, Inverell NSW 2360, Australia
Phone: 0417 159 205

Verified Customer Feedback
Excellent
4.8
/ 5
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“The Apollo ERX400 remote is perfect. I can change volume from the swim platform without touching the main unit. Proper modern setup.”
Liam F. — Sydney, NSW
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“Fusion stereo with JL subs — best decision ever. Crisp highs, smooth bass, and built tough for cold, salty conditions.”
Chloe D. — Hobart, TAS
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“The Signature 3 amps deliver clean power — no hiss, no noise. I run four zones onboard and everything stays balanced perfectly.”
Ethan P. — Perth, WA
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