Related Manuals for DS18 NXL-m4
Summarization of Contents
Features and Characteristics
Introduction
Overview of the DS18 NXL-M amplifier, its design, and suitability for marine environments.
Amplifier Elements Description
Gain Control
Explains the gain control function, its range, and provides step-by-step instructions for proper adjustment.
Filter Control
Describes the mode and frequency controls for channel filtering, including LPF/HPF options and frequency range.
Input Mode
Details the 2-channel and 4-channel input modes and how they affect signal output to amplifier channels.
Bass Boost Control
Explains the variable bass boost control, its range, and typical frequency for enhanced bass output.
Power, Protect, and Clip LEDs
Describes the function and meaning of the POWER, PROTECT, and CLIP LEDs on the amplifier.
High Level Input
Explains high-level inputs for connecting to factory speaker wires and their benefits for sound quality.
RCA Inputs
Details RCA inputs for source units with line-level outputs, recommending high-quality marine cables.
Power Terminal (+12V)
Describes the main power input, connection to the battery, and essential precautions for installation.
Remote Terminal
Explains how to turn the amplifier on using the remote terminal, typically powered by the source unit.
Ground Terminal
Details the main negative ground input, connection to the battery, and installation precautions.
Amplifier Installation Guide
Mounting and Ventilation
Guidance on selecting a suitable mounting location, ensuring ventilation and avoiding damage during installation.
Battery Disconnection and Wiring
Step-by-step instructions for disconnecting the battery, running power wire, and connecting to terminals.
Speaker Wiring and Connection
Guidance on running speaker wires, connecting them neatly, and ensuring correct polarity to avoid protection mode.
Head Unit Connections
Instructions for connecting the remote wire and RCA audio signal from the head unit to the amplifier.
Initial Power-Up and Adjustment
Guidance on turning on the amplifier for the first time and adjusting controls like crossover and gain for optimal sound.
Wiring and Connections
Stereo Low Level (RCA) Wiring
Diagram and explanation for connecting the amplifier using low-level RCA audio signals from the head unit.
Stereo High Level Input Wiring
Diagram and explanation for connecting the amplifier using high-level speaker output from the head unit.
Bridge Low Level Input (RCA) Wiring
Diagram and explanation for bridging low-level RCA inputs for specific speaker configurations.
Bridge High Level Input Wiring
Diagram and explanation for bridging high-level speaker outputs for specific speaker configurations.
NXL-M2 Specifications
Power and Audio Specs
Details power output, frequency response, signal-to-noise ratio, THD, and input level ranges.
Features and Indicators
Lists amplifier class, type, channels, protection features, LED indicators, and terminal sizes.
Extra Features and Water Resistance
Highlights water resistance rating (IPX5), PCB design, RCA output type, and UV compliance.
Measurements
Provides overall dimensions, heatsink length, and gross weight of the unit.
NXL-M4 Specifications
Power and Audio Specs
Details power output, frequency response, signal-to-noise ratio, THD, and input level ranges.
Features and Indicators
Lists amplifier class, type, channels, protection features, LED indicators, and terminal sizes.
Extra Features and Water Resistance
Highlights water resistance rating (IPX5), PCB design, RCA output type, and UV compliance.
Measurements
Provides overall dimensions, heatsink length, and gross weight of the unit.
Troubleshooting Common Issues
Amplifier Won't Power Up
Provides checks for power connection, remote terminal voltage, battery power, fuses, and protection LED status.
High Hiss or Engine Noise
Offers steps to diagnose and eliminate noise from the amplifier, suggesting input level adjustments.
Protection LED On
Guides on checking speaker leads for shorts, volume levels, and identifying potential amplifier faults.
Amplifier Overheating
Advises checking speaker impedance, shorts, and airflow; suggests external cooling if necessary.
Distorted Sound
Recommends verifying level controls, crossover settings, and checking speaker leads for shorts.
High Squeal Noise
Identifies poorly grounded RCA wires as the common cause for high squeal noise.
Warranty Information
Warranty Policy
Directs users to the DS18.com website for detailed warranty policy information.
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