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JBL MA758 Marine 8-Channel Amplifier – 75W RMS x8 Compact Class D Boat Amplifier
The JBL MA758 Marine 8-Channel Amplifier delivers powerful full-range JBL audio performance with 75 watts RMS x8 at 4 ohms, making it the perfect solution for high-performance boat audio systems. Built with advanced Class D technology, a compact low-profile chassis, and marine-ready durability, this amplifier provides clean, efficient, and crystal-clear sound while maximizing installation flexibility in limited onboard spaces.
Part Number: MA758AM
Reference: JBLMA758AM
In Stock: 2
$649.95
Available for local pickup at our Miami or Fort Lauderdale location
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JBL MA758 Marine 8-Channel Full-Range Class D Amplifier with 75W RMS x8 Power, Compact Marine-Ready Design & Advanced Boat Audio Performance
The JBL MA758 Marine 8-Channel Amplifier is engineered to deliver powerful, high-efficiency JBL audio performance for boats and marine entertainment systems. Designed specifically for marine applications, this compact amplifier combines advanced Class D technology, flexible multi-channel configuration, and rugged reliability to create an immersive onboard listening experience.
Its compact low-profile chassis is ideal for marine installations where available space is limited, allowing easy integration into boats, yachts, wake boats, center consoles, and other marine environments without sacrificing performance.
Powered by advanced Class D amplifier technology, the JBL MA758 delivers exceptional full-range audio output with:
- 75 watts RMS x8 at 4 ohms
- 125 watts RMS x8 at 2 ohms
- 250 watts RMS x4 bridged at 4 ohms
This versatile 8-channel configuration makes the amplifier ideal for powering multiple marine speakers throughout the boat while maintaining clean, dynamic sound performance with excellent efficiency and minimal current draw.
Designed for precise marine audio tuning, the MA758 includes variable high-pass and low-pass crossovers (32Hz–320Hz) with 12 dB/octave slopes, allowing users to optimize sound performance for different speaker configurations and listening environments onboard.
The amplifier also features:
- Speaker-level and low-level inputs
- Adjustable input sensitivity controls
- Multiple input modes (2-channel, 4-channel, and 8-channel operation)
- Balanced Differential Inputs for low noise and reduced engine interference
- Full-range signal distribution for advanced system expansion
Its conformal-coated circuit boards and corrosion-resistant connections help protect the amplifier against moisture, humidity, and harsh marine conditions, ensuring long-lasting reliability on the water.
To maximize protection and durability, the JBL MA758 includes advanced onboard circuitry designed to guard against:
- Overheating
- Short circuits
- Overvoltage
- Undervoltage
Whether powering multiple speakers in a premium marine audio system or upgrading your boat’s entertainment setup, the JBL MA758 delivers the legendary JBL sound performance boaters expect.
Key Features
| Feature | Description |
| Amplifier Type | 8-Channel Marine Amplifier |
| Amplifier Technology | Class D |
| Full-Range Power Output | 75W RMS x8 at 4 Ohms |
| Power Output at 2 Ohms | 125W RMS x8 |
| Bridged Power Output | 250W RMS x4 |
| Compact Design | Low-Profile Marine Chassis |
| Variable Crossovers | High-Pass & Low-Pass Filters |
| Input Modes | 2Ch / 4Ch / 8Ch |
| Noise Reduction | Balanced Differential Inputs |
| Corrosion Resistance | Marine-Grade Coated Circuit Boards |
| Marine Application | Boats, Yachts & Outdoor Audio Systems |
Power Specifications
| Specification | Details |
| RMS Power @ 4 Ohms | 75W x8 |
| RMS Power @ 2 Ohms | 125W x8 |
| Bridged RMS Power | 250W x4 |
| Amplifier Class | Class D |
| Frequency Filters | 32Hz – 320Hz |
| Filter Slope | 12 dB/Octave |
| Signal-to-Noise Ratio | 80 dB |
Dimensions
| Specification | Measurement |
| Amplifier Dimensions | 14-3/16” W x 2-1/16” H x 7” D |
| Metric Dimensions | 360mm x 51.3mm x 180mm |
| Chassis Design | Compact Low-Profile |
Installation & Connectivity
| Specification | Details |
| Inputs | RCA & Speaker-Level Inputs |
| Input Modes | 2Ch / 4Ch / 8Ch |
| Recommended Wiring | 4-Gauge Power & Ground |
| Fuse Rating | 35A x3 |
| Input Sensitivity | Adjustable |
| Turn-On Modes | DC / REM Selectable |
What's In The Box
- JBL MA758 Marine Amplifier
- 4 Bare Wire-to-RCA Adapters
- 6 x 35A ATO Fuses
- Mounting Screws
- JBL Stickers
- Owner’s Manual
- JBL Logo Badge
- Allen Wrenches
