This document serves as an installation guide and specifications manual for the Stinger MT Series monoblock amplifiers, covering models MT-700.1, MT-1000.1, MT-1500.1, and MT-2000.1. These amplifiers are designed to power subwoofers in a car audio system, providing dedicated amplification for low-frequency sound reproduction.

Function Description

The Stinger MT Series monoblock amplifiers are Class D amplifiers, optimized for efficiency and powerful bass output. Their primary function is to take a low-level audio signal from a head unit or line output converter (LOC) and amplify it to drive a subwoofer or multiple subwoofers. Being "monoblock," they are designed for single-channel output, typically used for bass applications.

Key functional components include:

Power Connections: These amplifiers require a robust power connection to the vehicle's battery, a ground connection to the vehicle chassis, and a remote turn-on signal from the head unit or LOC. A crucial safety feature is the requirement for an external fuse on the positive (+) power wire, with the correct size specified in the product's specifications to prevent electrical damage.
Signal Connections: The amplifiers receive audio input via RCA connections from the head unit or LOC. This ensures a clean, low-level signal for amplification.
Output Connections: The amplified signal is sent to the subwoofer(s) via dedicated speaker terminals. These terminals are designed to handle the high current required for powerful bass.
Amplifier Controls: A suite of controls allows users to fine-tune the amplifier's performance to match the specific subwoofer, vehicle acoustics, and personal listening preferences. These controls include:
- Gain: Adjusts the input sensitivity to match the output level of the source unit, preventing distortion and ensuring optimal signal-to-noise ratio.
- Low Pass Filter (LPF): A variable crossover that allows only frequencies below a set point to pass through to the subwoofer. This is essential for integrating the subwoofer seamlessly with the rest of the audio system, typically set around 80Hz.
- Subsonic Filter: A high pass crossover that filters out extremely low frequencies below the audible range or below the subwoofer's effective operating range. This protects the subwoofer from over-excursion and wasted power, often set between 30-35Hz.
- Boost Frequency (FREQ): Selects the specific frequency (from 30Hz to 80Hz) that will be boosted by the "BOOST" control.
- BOOST: Provides a variable bass boost (from 0dB to 12dB) at the selected boost frequency, allowing users to enhance bass impact.
Remote Bass Control: An included remote knob (SA1RBC) connects to the amplifier, allowing the driver to adjust the bass level conveniently from their seat. This provides on-the-fly control over the subwoofer's output without needing to access the amplifier directly.
Bridging Capability: The amplifiers can be bridged together to combine their power output, effectively creating a single, more powerful amplifier for demanding applications. This involves specific wiring configurations for both power and speaker outputs, with all adjustments made on the primary amplifier. A minimum impedance of 2 ohms is required for bridged operation.

Usage Features

The Stinger MT Series amplifiers offer several features that enhance their usability and integration into a car audio system:

User-Friendly Controls: The clearly labeled controls for gain, LPF, subsonic filter, boost frequency, and boost level make it straightforward for users to dial in their desired sound. The variable nature of these controls allows for precise adjustments to suit different musical genres and listening preferences.
Remote Bass Control: The inclusion of a remote bass knob is a significant convenience feature. It allows the driver to adjust the subwoofer's volume independently of the main head unit volume, which is particularly useful for different types of music or when passengers prefer varying levels of bass.
Protection Circuitry: The amplifiers incorporate protection features indicated by the "Protect LED [PRT]". This LED illuminates red when the amplifier is powering up or if it enters protection mode due to issues like overheating, short circuits, or low voltage. This safeguards the amplifier and connected components from damage. The "Power LED [PWR]" indicates when the amplifier is operational (blue).
Bridging for Increased Power: For users seeking maximum bass output, the ability to bridge two amplifiers together provides a flexible solution. This allows for a significant increase in power to drive larger or multiple subwoofers, catering to high-performance audio systems. The manual provides clear instructions on how to connect two amplifiers in a bridged configuration, emphasizing that all adjustments should be made on the primary amplifier.
Compact Design: While not explicitly detailed in the function description, the provided dimensions for each model (e.g., 12.16in / 309mm length for MT-2000.1, 6.10in / 155mm width, 2.09in / 53mm height) indicate a relatively compact footprint for their power output. This makes them easier to install in various vehicle locations, such as under seats or in trunk compartments, where space is often limited.
Wide Operating Voltage: The amplifiers are designed to operate within a typical vehicle's electrical system, with an operating voltage range of 9V to 16V, ensuring compatibility with most cars and trucks.

Maintenance Features

While car audio amplifiers generally require minimal user maintenance, the manual provides essential information related to the longevity and proper functioning of the device:

External Fusing Requirement: The explicit instruction to add an external fuse to the positive power wire is a critical maintenance and safety measure. This fuse acts as a sacrificial component, protecting the amplifier and the vehicle's electrical system from overcurrents. Users are directed to refer to the specifications for the correct fuse size, ensuring proper protection. Regular inspection of this fuse, especially if the amplifier stops working, is an implied maintenance task.
Troubleshooting via Protect LED: The "Protect LED [PRT]" serves as a diagnostic tool. If it illuminates red, it signals a potential issue that needs attention, such as a shorted speaker wire, inadequate ventilation leading to overheating, or a power supply problem. While the manual doesn't detail specific troubleshooting steps for each protection mode, the presence of this indicator guides users to investigate potential problems, which is a form of preventative maintenance.
Proper Installation Guidelines: The installation guide itself serves as a foundational maintenance feature. By following the instructions for power, ground, remote, and signal connections, users ensure the amplifier operates within its intended parameters, reducing the likelihood of premature failure due to incorrect wiring or inadequate power supply. Correct speaker impedance matching, though not explicitly detailed as a maintenance task, is crucial for the amplifier's health and is implicitly covered by the specifications.
Warranty Information: The detailed limited warranty information outlines the manufacturer's commitment to product quality and provides a clear path for service if defects in materials or workmanship occur within the one-year warranty period. This includes instructions on what is covered (manufacturing defects, malfunction) and what is not (accident, misuse, improper installation, cosmetic damage). While not a direct maintenance task, understanding the warranty helps users make informed decisions about repairs and ensures they follow proper procedures if service is needed. The "STOP! Please DO NOT return to seller" directive and contact information for support streamline the process for obtaining assistance, which is a key aspect of product support and long-term usability.

In summary, the Stinger MT Series monoblock amplifiers are robust and feature-rich devices designed for dedicated subwoofer amplification. They offer precise control over bass output, convenient remote adjustment, and essential protection features, all supported by clear installation guidelines and warranty information to ensure a reliable and enjoyable audio experience.

Stinger MT Series - Page 2

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