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Details the 2-year warranty, extension for authorized dealers, and items not covered like damage from misuse or improper installation.
Outlines the procedure for warranty service, requiring a Return Authorization number and proof of purchase.
Advises professional installation, proper mounting location, ventilation, and checking speaker load.
Addresses issues like no output, amp overheating, single channel operation, weak output, noise, and LED indicators.
Explains proper 12V+ battery connection with fusing and ground connection for marine and non-marine applications.
Details how to connect the remote turn-on lead from the source unit to the amplifier's REM terminal.
Guides users on adjusting gain, high pass filter (HPF), low pass filter (LPF), full range, and bass boost for optimal sound.
Explains the input mode switch for different channel configurations and the operation of remote controls.
Provides instructions on speaker polarity, minimum impedance requirements (2 ohm stereo, 4 ohm mono), and wiring diagrams.
Details the 2-year warranty, extension for authorized dealers, and items not covered like damage from misuse or improper installation.
Outlines the procedure for warranty service, requiring a Return Authorization number and proof of purchase.
Advises professional installation, proper mounting location, ventilation, and checking speaker load.
Addresses issues like no output, amp overheating, single channel operation, weak output, noise, and LED indicators.
Explains proper 12V+ battery connection with fusing and ground connection for marine and non-marine applications.
Details how to connect the remote turn-on lead from the source unit to the amplifier's REM terminal.
Guides users on adjusting gain, high pass filter (HPF), low pass filter (LPF), full range, and bass boost for optimal sound.
Explains the input mode switch for different channel configurations and the operation of remote controls.
Provides instructions on speaker polarity, minimum impedance requirements (2 ohm stereo, 4 ohm mono), and wiring diagrams.
The Memphis Marine Grade Amplifiers, including models MM900.6V, MM500.4V, and MM600.2V, are designed to provide high-quality audio performance in marine and powersports environments. These amplifiers are built with durability and resistance to the elements in mind, ensuring a robust solution for sound wherever you go.
These amplifiers serve as the core component for powering speakers in an audio system, amplifying the signal from a source unit to drive speakers with greater volume and clarity. They are specifically engineered for marine applications, featuring an IPX5 rating, which means they are protected against low-pressure water jets from any direction, making them suitable for environments where exposure to moisture is common.
The amplifiers incorporate various features to optimize sound output and protection. They include 12dB/octave Butterworth crossovers, which allow for precise frequency filtering, enabling users to direct specific frequency ranges to appropriate speakers (e.g., low frequencies to subwoofers, high frequencies to tweeters). The crossovers are fully variable, offering flexibility in tuning the audio system. High Pass Filters (HPF) are designed to remove low-frequency information from smaller speakers, protecting them from damage, with an adjustable range from 50 Hz to 1KHz. Low Pass Filters (LPF) remove high-frequency information from mid-bass speakers or subwoofers, preventing them from reproducing frequencies they are not designed for, with an adjustable range from 30Hz to 250Hz. A "Full Range" setting is also available to bypass all crossovers for use with outboard electronic crossovers.
Gain controls are provided to adjust the amount of signal required to drive the amplifier to full output, ensuring optimal performance with various source units. A variable bass boost feature (0-12dB) allows users to enhance low-frequency response, though it should be used with discretion as it places an additional load on the amplifier and speakers.
For user convenience, the amplifiers include a signal sensing auto turn-on feature, which detects an audio signal and automatically powers on the amplifier. A remote bass knob is included, allowing for easy adjustment of bass levels from the user's listening position. Protection circuitry is integrated to safeguard the amplifier against overload, short circuit, thermal issues, and reverse polarity, ensuring longevity and reliable operation. An LED light strip provides visual indication of the amplifier's status.
The Memphis Marine Grade Amplifiers are designed for ease of installation and operation in challenging environments. They feature removable power terminals and removable sealed signal connectors, which simplify wiring and enhance protection against moisture. All controls are top-mounted and protected by a water-resistant panel, which must be properly installed and tightened to create a seal, preventing water ingress.
For optimal performance and durability, Memphis recommends using Memphis Connection accessories, including properly sized wire and terminals. This not only boosts the listening experience but also increases the longevity of the products. When installing, it's crucial to inspect the mounting location carefully to avoid drilling into electrical, hydraulic, fuel, or fluid lines. Amplifiers should be mounted in areas with adequate ventilation and away from excessive direct contact with water, as they are water-resistant but not designed to be submerged.
Speaker wiring requires careful attention to polarity to ensure speakers are in phase, which is essential for proper bass reproduction. The amplifiers require a minimum 2-ohm impedance in stereo or 4 ohms in mono (bridged) mode. It is critical to check the speaker load with a multi-meter before connecting to avoid damage to the amplifier, as damage from incorrect impedance is not covered under warranty.
The input mode switch on the MM900.6V allows users to select the number of audio inputs being used, providing flexibility for different system configurations. The remote controller, specific to each model (e.g., RG6 for MM600.2V, RG7 for MM900.6V), allows for convenient adjustment of the amplifier's output level.
Maintaining the Memphis Marine Grade Amplifiers involves ensuring proper installation and addressing any issues promptly. The water-resistant design helps protect internal components from moisture, but it's important to keep the top-mounted control panel sealed when operating in wet conditions.
Troubleshooting guidance is provided in the manual to help users diagnose common issues. This includes checking all wiring connections, verifying +12V and REM terminals have power, ensuring the ground connection is secure, and confirming the signal source is supplying an output. For "No Output" issues, users can test the amplifier by briefly tapping the center pin of a disconnected RCA cable, which should produce a noise in the speakers if the amp is working.
If the amplifier becomes hot, checking the speaker impedance or load is recommended to ensure it meets the minimum requirements. For issues where "Only One Channel Works," users should check speaker terminal strip connections, the balance control on the source unit, and reverse RCA input plugs to isolate the problem to either the source unit/cable or the amplifier.
"Weak Output" can often be resolved by adjusting the input sensitivity control. "Unwanted Noise," such as whine or clicking, often points to grounding issues or interference from the vehicle's ignition system. Rerouting speaker input wires away from light and accessory wires can also help reduce noise. If these steps do not resolve the noise, professional audio installer assistance is recommended.
The illumination of a red LED indicates a protection mode, which could be due to a shorted speaker or wire, battery voltage being too high or too low, or the amplifier overheating due to improper ventilation. Addressing these underlying causes is crucial for the amplifier's health.
For warranty service, a Return Authorization number is required. Memphis Audio emphasizes careful packaging for returns to prevent damage during shipment. The warranty covers defects in material or workmanship for 2 years, extended to 3 years if installed by an authorized dealer using Memphis Connection products. The warranty is void if the product is physically damaged, improperly used, abused, or if repairs are attempted outside of a Memphis Audio facility. It's important to note that the warranty does not cover damage from improper installation, exposure to moisture, excessive heat, chemical cleaners, UV radiation, negligence, misuse, accident, criminal activity, or service performed by unauthorized personnel. It also excludes cosmetic damage, freight damage, and costs associated with removal or re-installation.
General| Channels | 6 |
|---|---|
| RMS Power @ 4 Ohms | 75W x 6 |
| Minimum Impedance Unbridged | 2 Ohms |
| Minimum Impedance Bridged | 4 Ohms |
| Frequency Response | 20Hz - 20kHz |
| Signal to Noise Ratio | >90dB |
| Input Sensitivity | 200mV - 6V |
| Bass Boost | 0-12dB |
| Fuse Rating | 40A |
| Crossover Type | Variable High-Pass / Low-Pass |
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