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Illuminates when the remote on system is energized.
Adjusts high impedance input gain for optimal car stereo matching.
Connects to units with BTL circuitry or common-ground types.
Utilizes gold-plated RCA jacks for high impedance connections.
Safeguards amplifier and vehicle electrical system from faults.
Connects the +12V DC power supply wire to the BATT+, GROUND, and REMOTE terminals.
Connects speakers easily to barrier strip, supports 4-8 ohms.
Details wiring for high impedance input using RCA connectors from car stereo.
Covers BTL or Common Ground input for 4 or 2 speaker outputs.
Illuminates when the remote on system is energized.
Adjusts high impedance input gain for optimal car stereo matching.
Connects to units with BTL circuitry or common-ground types.
Utilizes gold-plated RCA jacks for high impedance connections.
Safeguards amplifier and vehicle electrical system from faults.
Connects the +12V DC power supply wire to the BATT+, GROUND, and REMOTE terminals.
Connects speakers easily to barrier strip, supports 4-8 ohms.
Details wiring for high impedance input using RCA connectors from car stereo.
Covers BTL or Common Ground input for 4 or 2 speaker outputs.
The Pyle PLMRA400 Elite Series Waterproof Amplifier is a 400-watt, 4-channel amp system designed for mobile applications, particularly in marine environments, thanks to its waterproof rating. This innovative system incorporates a dual MOSFET power supply and is engineered to produce high-quality stereo reproduction. It operates on a 12-volt DC negative ground power supply and offers easy installation with included mounting hardware.
The amplifier features two input levels: high impedance and low impedance. This versatility allows it to be connected to various car stereo units, including those with BTL circuitry or common-ground types. The front panel of the amplifier includes several key controls and terminals for setup and operation. A "POWER ON LED" illuminates when the remote system is energized, providing a visual indicator of the amplifier's status. The "INPUT GAIN CONTROL" allows users to adjust the high impedance input gain from 1V to 300mV, ensuring optimal matching with the PREAMP output of their car stereo.
For low impedance input, the unit provides two terminal inputs (Front & Rear). If your car stereo has four speaker outputs (LF, RF, LR, RR), the wiring should follow specific diagrams provided in the manual. For car stereos with only two speaker outputs, alternative wiring diagrams are available. The high impedance input is facilitated by gold-plated RCA input jacks. If your stereo has only left and right 2-channel outputs, a Y-adaptor is required for connection.
A "POWER FUSE" is integrated into the amplifier to protect both the amplifier itself and the automobile's electrical system from incorrect electrical conditions. The "POWER SUPPLY TERMINAL" is where the +12V DC power supply wire is connected, accessible via lugs and screws on the amplifier's panel. This terminal has three main connections: "BATT +" for connecting to the positive terminal of the battery, "GROUND" for connecting to the ground wire from the automobile's chassis, and "REMOTE" for connecting the control wire that provides remote turn-on and off of the amplifier, typically from the radio/cassette player's power antenna wire.
Speaker connections are made through "SPEAKERS TERMINALS," which are signal barrier strips designed for easy connection. The amplifier supports 4 to 8 ohms speakers, and users are advised to check speaker connection diagrams before connecting. The manual provides detailed diagrams for both high and low impedance input connections, including floating ground and common ground types for two-speaker and four-speaker output modes. It's important to note that high and low impedance inputs cannot be used simultaneously.
The amplifier is equipped with built-in short circuit protection. In the event of incorrect speaker wiring (e.g., speaker wires connected to ground, or positive and negative wires shorting together), the protection circuit will automatically activate and cut off the output. If this occurs, users must immediately switch off the entire system, double-check all speaker wire connections and isolation, and then switch the amplifier back on.
Installation involves choosing a suitable location, checking for adequate clearance, and wiring the unit according to the provided diagrams. For line-level (high impedance) mode, using gold-plated RCA connection cables that are as short as possible and mounting the unit close to the receiver is recommended to minimize stray magnetic pick-up and noise.
For power connection, the B+12V pole of the power supply should be connected directly to the battery's positive terminal. The GND pole should be connected to the negative ground battery terminal or the car chassis. To ensure good grounding and prevent "motor boating" noise, an additional 12-gauge minimum wire should be connected from the negative battery terminal to the chassis of the stereo unit. The "Remote" pole connects to an external switch for positive 12V ON/OFF, which can be linked to the receiver's power antenna lead.
Testing the amplifier involves turning on the stereo after all connections are made and listening for the amplifier to turn on. If unusual noises are heard, the system should be turned off, and all wiring rechecked. After connecting the radio or equalizer, the gain control can be adjusted to match the radio's output level. This involves setting the radio volume to 2/3 position, adjusting the gain control for an average listening level, then turning the radio volume down to listen for background noise. Starting the vehicle allows for checking electrical noise. Fine adjustments to sensitivity can help reduce background and engine noise. A crucial caution is never to turn the sensitivity up beyond what is needed to achieve clear sound at 2/3 volume, and this adjustment only needs to be made once.
Maintenance suggestions emphasize keeping the amplifier dry, as liquids can corrode electronic circuits. It should be used and stored in normal temperature environments to prevent shortening the life of electronic devices or distorting/melting plastic parts. Gentle handling is advised to avoid damaging circuit boards and cases. Keeping the amplifier free from dust and dirt helps prevent premature wear of parts. For cleaning, a damp cloth is recommended, while harsh chemicals, cleaning solvents, or strong detergents should be avoided.
General| Amplifier class | - |
|---|---|
| Audio output channels | 4.0 channels |
| Peak power per channel | 100 W |
| Signal-to-Noise Ratio (SNR) | - dB |
| Total Harmonic Distortion (THD) | - % |
| Multichannel pre out connectivity | RCA |
| Purpose | Car |
| Product color | Gray |
| Connectivity technology | Wired |
| Built-in display | No |
| LED indicators | Yes |
Weight and Dimensions| Depth | 203 mm |
|---|---|
| Width | 200 mm |
| Height | 51 mm |
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