Description
Included in this kit
This bundle includes a MTX MA400.4 400-Watt RMS Full Range Class D 4-Channel Marine Amplifier, and 2x MTX MA65C-B - Marine 6.5” 85-Watt RMS 4Ω Coaxial Speaker Pair IP-67 Rated Black with RGB Lighting and Customizable Grille.
1x MTX MA400.4 400-Watt RMS Full Range Class D 4-Channel Marine Amplifier (MA400.4)
Reliable full-range power in a marine-ready design. The MA400.4 from MTX delivers 100 watts RMS per channel with clean, balanced output and Class D efficiency. Built to perform in tough marine conditions, it features conformal coating, stainless steel hardware, and the same advanced protection and tuning controls you expect from MTX.
Big Power in a Compact Design
The MA400.4 delivers 100 watts RMS per channel at 2Ω, pushing crisp, distortion-free sound through every speaker in your setup. Its compact footprint makes it easy to install without sacrificing performance. Each amp includes a Dyno Power Rating Certificate, confirming that you’re getting real, verified power.
Features
Conformal Coated Circuit Board for Water & Salt Resistance
Stainless Steel Hardware to Prevent Corrosion
400 Watts RMS Power Output
Reliable Full-Range Class-D Circuit Design
Compact Size for Flexible Installation
10V High-Level Audio Input Compatibility
High-Quality Tiffany-Style RCA Input
Power and Protection LED Indicator Light
Surface Mount Component Technology
Direct Insert Power and Speaker Terminals
Thermal, Short, and Over/Under Voltage Protection
Clip Detection Light for Tuning Optimization
Dyno Power Rating Certificate
SPECIFICATIONS
Description: 4-Channel
Topology: Full Range Class D
4Ω RMS Power Output: 50W x 4 Channels
2Ω RMS Power Output: 100W x 4 Channels
4Ω RMS Bridged Power Output : 200W x 2 Channels
THD: < 0.1%
Signal to Noise Ratio: > 98dB
Frequency Response: 20Hz - 20KHz
Crossover: 40Hz - 400Hz
Maximum Input Signal: 10V
Warranty Period: 24 months from date of purchase
Dimensions Length: 6 ³⁄₄” (171mm) Width: 7” (178mm) Depth: 2" (51mm) Weight: 4.88Lbs (2.21Kg)
2x MTX MA65C-B - Marine 6.5” 85-Watt RMS 4Ω Coaxial Speaker Pair IP-67 Rated Black with RGB Lighting and Customizable Grille (MA65C-B)
MA65C-B 6.5" 85-Watt Marine Coaxial Speakers (Sold in Pairs)
The MTX MA65C-B is a 6.5-inch marine coaxial speaker pair designed for clear, reliable audio in harsh marine and open-air environments. With marine-ready construction, integrated RGB LED lighting, compact mounting depth, and balanced coaxial driver design, it is built for boats, UTVs, and other installations where durability and consistent sound performance both matter.
Overview
Built for Marine and Open-Air Use
The MA65C-B is designed as a durable 6.5-inch marine coaxial speaker for applications exposed to sun, water, salt, and other demanding outdoor conditions. It is positioned as an upgrade for boats, UTVs, and similar open-air systems where dependable long-term performance is critical.
Sold in pairs, the speaker combines weather-focused materials, balanced coaxial sound design, integrated RGB lighting, and installation-friendly dimensions in a compact package.
- 6.5" marine coaxial speaker pair.
- Designed for boats, UTVs, and other open-air installations.
- Built for durability as well as everyday listening performance.
Marine Construction
Tested for Harsh Environments
The MA65C-B is built to handle prolonged exposure to marine conditions. The front side is IP67 rated and the speaker has passed 500 hours of ASTM G154 UV testing and 500 hours of ISO 16750-4 salt spray testing. An ASA impact-resistant grille adds another layer of protection in demanding installs.
- Front-side IP67 rated.
- 500-hour UV testing and 500-hour salt spray testing.
- ASA impact-resistant grille for added physical protection.
Feature Highlights
What the MA65C-B Brings to a Build
Driver Design
Polypropylene Woofer with Dual Tweeters
The MA65C-B uses a polypropylene woofer paired with dual Teteron dome tweeters to create a balanced coaxial presentation. The provided product data emphasizes clear mids and highs with controlled low-end response, helping the speaker maintain consistency in open-air listening environments.
- Polypropylene woofer.
- Dual Teteron dome tweeters.
- Designed for clear, balanced sound reproduction.
Installation & Styling
Built for Practical Marine Installs
In addition to its marine-ready protection, the MA65C-B includes practical install features such as quick disconnect terminals and compact depth. The paintable grille overlay and integrated RGB lighting add visual flexibility for customized marine and powersports systems.
- Quick disconnect speaker and RGB terminals.
- Paintable grille overlay.
- Black finish.
| Model | MTX MA65C-B |
| SKU | MA65C-B |
| Configuration | 6.5" marine coaxial speaker |
| Sold As | Pairs |
| Power Handling | 85 watts RMS |
| Sensitivity | 90dB |
| Woofer Material | Polypropylene |
| Tweeters | Dual Teteron dome tweeters |
| Lighting | Integrated RGB LED lighting |
| Grille | ASA impact-resistant grille with paintable overlay |
| Terminals | Quick disconnect speaker and RGB terminals |
| UV Testing | ASTM G154 UV testing – 500 hours |
| Salt Spray Testing | ISO 16750-4 salt spray testing – 500 hours (front side only) |
| Water Resistance | IP67 rated (front side only) |
| Compliance | CEA-2031 complaint |
| Color | Black |
| Overall Diameter | 6 13/16" (173mm) |
| Screw Mounting Diameter | 6 3/16" (156mm) |
| Overall Height | 3 3/4" (95mm) |
| Mounting Depth | 2 1/2" (62mm) |
| Cut-out Diameter | 5 3/8" (136mm) |
| Grille Height | 1 1/4" (32mm) |
The MA65C-B is described as a marine-ready speaker for boats, UTVs, and other open-air installations where weather resistance, durability, and reliable audio performance are all important.