Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your MTX Terminator TN2501 Mono Block Amplifier. Designed for car audio systems, this amplifier delivers true RMS power with a Class D topology for high efficiency and reduced heat generation. Please read this manual thoroughly before installation and use to ensure proper function and safety.
Safety Information
- Professional Installation Recommended: Due to the complexity of car audio systems, professional installation is highly recommended.
- Disconnect Battery: Always disconnect the vehicle's negative battery terminal before beginning any installation.
- Proper Wiring: Ensure all wiring is correctly sized and fused to prevent damage to the amplifier, vehicle, or potential fire hazards.
- Ventilation: Mount the amplifier in a location that allows for adequate air circulation to prevent overheating.
- Avoid Moisture: Do not expose the amplifier to moisture or extreme temperatures.
- Hearing Protection: Prolonged exposure to high volume levels can cause permanent hearing loss. Use caution when adjusting audio levels.
Package Contents
Verify that all items are present in the package:
- MTX TN2501 Mono Block Amplifier
- Remote Bass Knob
- Mounting Hardware (screws)
- User Manual (this document)
Image: The MTX TN2501 amplifier shown alongside its included remote bass knob.
Product Features
The MTX Terminator TN2501 amplifier incorporates several features for optimal performance and user convenience:
- Compact and Powerful: Delivers true RMS power in a redesigned chassis, suitable for tight installations.
- Efficient Class-D Topology: Increases efficiency and reduces heat generation for reliable performance and extended lifespan.
- Comprehensive Protection: Features state-of-the-art circuit protection against short circuits, thermal overload, and under/over voltage conditions.
- Integrated Adjustment Circuits: Fully adjustable gain and crossover controls, along with integrated bass boost and subsonic circuits, allow for audio customization.
- Convenient Remote Control: Includes a remote bass knob for immediate bass level adjustments.
- Surface Mount Component Technology: Enhances durability and compact design.
- Direct Insert Power and Speaker Terminals: For secure and efficient connections.
- Power and Protection LED Light Status Indicator: Provides visual feedback on amplifier status.
Setup and Installation
Mounting the Amplifier
Choose a mounting location that is dry, well-ventilated, and secure. Ensure sufficient space around the amplifier for air circulation to prevent overheating. Avoid mounting on carpet or in enclosed spaces without airflow. Use the provided mounting hardware to secure the amplifier firmly to a solid surface in your vehicle.
Wiring Connections
Proper wiring is crucial for performance and safety. Refer to the diagram below for terminal identification and ensure all connections are tight and secure.
Image: Rear view of the MTX TN2501 amplifier showing the power, remote, ground, and speaker output terminals.
- Power (+12V): Connect a fused power cable directly from the vehicle's positive battery terminal. The fuse should be located within 18 inches of the battery.
- Ground (GND): Connect a ground cable of the same gauge as the power cable to a clean, unpainted metal surface of the vehicle chassis. Ensure a good electrical connection.
- Remote (REM): Connect a remote turn-on wire from your head unit's remote output. This wire signals the amplifier to turn on and off with your stereo.
- Speaker Output (+SUB / -SUB): Connect your subwoofer(s) to these terminals. Ensure correct polarity. The TN2501 is a mono amplifier, designed for a single subwoofer or multiple subwoofers wired to a 1-ohm or 2-ohm load.
- RCA Input (SUB): Connect RCA cables from your head unit's subwoofer pre-out to the amplifier's RCA input.
- EBC (External Bass Control): Connect the remote bass knob to this port.
Operating Instructions
The MTX TN2501 features several controls to fine-tune your audio experience. These controls are located on the side panel of the amplifier.
Image: Side view of the MTX TN2501 amplifier showing the control panel with various adjustment knobs and switches.
Controls and Adjustments
- PWR / PRT LED:
- Green: Amplifier is powered on and operating normally.
- Red: Amplifier is in protection mode due to a fault (e.g., short circuit, overheating, under/over voltage).
- BOOST (0 - 12dB @ 45Hz): Adjusts the bass boost level at 45Hz. Use sparingly to avoid distortion.
- SUBSONIC (10Hz - 55Hz): A high-pass filter for frequencies below the audible range. This protects your subwoofer from playing ultra-low frequencies that can cause damage and waste power. Set it slightly below your subwoofer's resonant frequency or port tuning frequency.
- LPF (Low Pass Filter) (50Hz - 250Hz): A low-pass filter that allows only frequencies below the set point to pass through to the subwoofer. Adjust this to blend the subwoofer output with your main speakers.
- PHASE (0° / 180°): Adjusts the phase of the subwoofer output relative to the main speakers. Experiment with both settings to find the one that provides the most cohesive bass response.
- GAIN (MIN - MAX): Matches the amplifier's input sensitivity to the output voltage of your head unit. Start with the gain at minimum and slowly increase it until you hear distortion, then back off slightly. Do not use the gain control as a volume knob.
- Remote Bass Knob: Allows for convenient adjustment of the bass level from the driver's seat.
Maintenance
The MTX TN2501 amplifier requires minimal maintenance. Follow these guidelines to ensure longevity:
- Keep Clean: Periodically wipe the amplifier's exterior with a soft, dry cloth to remove dust and debris.
- Ensure Ventilation: Regularly check that the amplifier's cooling fins are not obstructed by dirt or other objects.
- Check Connections: Occasionally inspect all wiring connections for tightness and corrosion. Loose connections can lead to poor performance or damage.
- Avoid Liquids: Do not spray cleaning liquids directly onto the amplifier.
Troubleshooting
If you experience issues with your MTX TN2501 amplifier, consult the following table before contacting support:
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power (PWR LED off) | Blown fuse, loose power/ground/remote wire, no remote signal. | Check inline fuse, verify all power connections, ensure head unit is sending a remote signal. |
| Protection Mode (PRT LED red) | Short circuit in speaker wiring, amplifier overheating, impedance too low, under/over voltage. | Check speaker wiring for shorts, ensure adequate ventilation, verify speaker impedance, check vehicle's electrical system. |
| No Sound Output | RCA cables disconnected, gain set too low, speaker wires disconnected. | Verify RCA connections, adjust gain setting, check speaker wire connections. |
| Distorted Sound | Gain set too high, LPF/Subsonic settings incorrect, poor ground connection. | Reduce gain, adjust LPF/Subsonic filters, check ground connection. |
Specifications
The following are the technical specifications for the MTX Terminator TN2501 Mono Block Amplifier:
| Specification | Value |
|---|---|
| Topology | Class D |
| 4Ω RMS Power Output | 150W x 1 Channel |
| 2Ω RMS Power Output | 250W x 1 Channel |
| THD | <0.3% |
| Signal to Noise Ratio | > 95dB |
| Frequency Response | 20Hz - 250Hz |
| Crossover (LPF) | 50Hz - 250Hz |
| Subsonic Filter | 10Hz - 55Hz |
| Bass Boost | 0 - 12dB @ 45Hz |
| Maximum Input Signal | 6V |
| Item Model Number | TN2501 |
| Package Dimensions | 6.5 x 5.5 x 2 inches |
| Weight | 5 Pounds |
| Mounting Type | Surface Mount |
Warranty and Support
The MTX Terminator TN2501 amplifier comes with a 24-month warranty from the date of purchase, covering defects in materials and workmanship. Please retain your proof of purchase for warranty claims.
For technical support, troubleshooting assistance beyond this manual, or warranty inquiries, please contact MTX customer service through their official website or authorized dealers. Provide your product model number (TN2501) and a detailed description of the issue when seeking support.
