Directed 2400d Manual

The Directed 2400d is a high-performance car audio amplifier featuring 2400 watts RMS power output, advanced MOSFET power supply, variable low-pass crossover, bass boost control, remote bass level control capability, speaker-level inputs, preamp outputs, thermal/overload/short circuit protection, and LED power/protection indicators. Designed for automotive use with 12V DC power requirement. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-power MOSFET amplifier, Remote bass control port, Speaker-level inputs, Preamp outputs, Protection circuitry.

Feature	Description
Power Output	2400 watts RMS at 1 ohm
MOSFET Power Supply	Efficient switching power supply
Low-Pass Crossover	Variable 50Hz - 250Hz
Bass Boost	0-18dB boost at 45Hz
Remote Bass Control	Optional remote level adjustment
Speaker-Level Inputs	For factory radio integration
Preamp Outputs	For daisy-chaining multiple amplifiers
Protection Circuitry	Thermal, overload, and short circuit protection
LED Indicators	Power and protection status
Power Requirements	12V DC automotive electrical system

Installation

Unpack and inspect contents. Choose suitable mounting location in vehicle.

1. Disconnect vehicle battery: Remove negative terminal for safety.
2. Mount amplifier: Secure to solid surface with adequate ventilation.
3. Connect power: Run 4-gauge power wire from battery with fuse holder.
4. Connect ground: Use short, thick ground wire to vehicle chassis.
5. Connect remote turn-on: Connect to head unit remote wire.
6. Connect audio inputs: Use RCA cables or speaker-level inputs.
7. Connect speakers: Use appropriate gauge speaker wire.

WARNING! Always disconnect battery before installation. Ensure proper fuse rating.

First-Time Setup

Reconnect battery; power on system and configure settings.

1. Set gain: Start with low setting, adjust for clean sound.
2. Configure crossover: Set low-pass frequency (80Hz recommended start).
3. Adjust bass boost: Start at minimum, increase gradually if needed.
4. Test operation: Play music at normal listening levels.
5. Fine-tune settings: Adjust for optimal sound quality.

CAUTION! Avoid clipping by setting gain properly. Monitor amplifier temperature.

Specifications

• RMS Power: 2400 watts @ 1 ohm
• Frequency Response: 20Hz - 250Hz
• Signal-to-Noise Ratio: >100dB
• Crossover: Variable low-pass 50-250Hz
• Bass Boost: 0-18dB @ 45Hz
• Input Sensitivity: 200mV - 6V
• Input Impedance: 10k ohms
• Operating Voltage: 11-16V DC
• Fuse Rating: 120A external
• Dimensions: Standard amplifier size

Controls and Settings

Access controls via front panel knobs and switches.

Front Panel: Gain control, Low-pass crossover, Bass boost, Phase switch.

Gain: Adjust input sensitivity (start low, increase gradually). Low-pass crossover: Set frequency cutoff for subwoofers. Bass boost: Increase low-frequency output at 45Hz. Phase: 0/180 degree switch for proper speaker alignment. Remote bass: Optional remote level control connection.

Connecting Devices

Power: Battery connection with fuse. Audio: RCA inputs or speaker-level. Speakers: Subwoofer outputs.

1. Disconnect battery before making connections.
2. Use proper gauge wire for power and speakers.
3. Connect remote turn-on to head unit blue wire.
4. Use high-quality RCA cables for best performance.
5. Ensure solid ground connection to vehicle chassis.

Tip: Keep power and signal cables separated to avoid noise.

Operation Modes

Supports various subwoofer configurations and operating modes.

1. Mono operation: Standard subwoofer amplifier mode.
2. Bridgeable: Can bridge channels for higher power.
3. Low-pass operation: Filters high frequencies for subwoofers.
4. Remote control: Optional bass level adjustment from driver position.
5. Protection mode: Automatic shutdown if issues detected.

WARNING! Do not operate below rated impedance. Monitor for overheating.

Protection Features

Thermal Protection: Shuts down if temperature exceeds safe limits. Overload Protection: Protects against excessive current draw. Short Circuit Protection: Safeguards against speaker wire shorts. DC Offset Protection: Prevents DC voltage to speakers.

Care & Maintenance

Keep amplifier clean and dry. Ensure adequate ventilation. Check connections periodically.

CAUTION! Do not block ventilation openings. Avoid moisture exposure.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. Copyright © Directed Electronics; all rights reserved. For technical support, visit www.directed.com or contact 1-800-876-0800.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power/ground connections	Check battery connection; verify ground; check fuse.
Protection mode	Overheating/short circuit	Allow to cool; check speaker wires for shorts.
No sound	Input/remote connections	Check RCA cables; verify remote turn-on wire.
Distorted sound	Gain setting/clipping	Reduce gain setting; check head unit output.
Overheating	Insufficient ventilation	Improve airflow; check impedance load.

Reset: Disconnect power for 30 seconds to reset protection.

Service: 1-800-876-0800; www.directed.com