Directed D2205 Manual

The Directed D2205 is a high-performance 2-channel car amplifier designed for automotive audio systems. With 200 watts RMS power output, MOSFET power supply, variable low-pass filter, bass boost, and speaker-level inputs, it delivers exceptional sound quality for car audio enthusiasts. Below are key sections covering features, installation, setup, operation, specifications, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Operation 8. Protection Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: MOSFET power supply, thermal protection, short-circuit protection, variable low-pass filter, bass boost control, speaker-level inputs.

Feature	Description
Power Output	200 watts RMS (2 x 100W @ 4Ω)
MOSFET Power Supply	Efficient power conversion
Low-Pass Filter	Variable 50Hz - 250Hz
Bass Boost	0-18dB boost at 45Hz
Speaker-Level Inputs	For factory radio integration
Thermal Protection	Auto-shutdown at high temperatures
Short-Circuit Protection	Protects against wiring faults
Remote Turn-On	Remote turn-on capability
LED Power Indicator	Blue LED shows power status
Fuse Rating	25A x 2

Installation

Unpack and inspect contents. Choose suitable mounting location.

Disconnect vehicle battery: Remove negative terminal first.
Mount amplifier: Secure to solid surface with proper ventilation.
Connect power: Run 4-gauge power cable from battery to amp.
Connect ground: Use short, thick cable to clean chassis point.
Connect speakers: Use appropriate gauge speaker wire.
Connect audio inputs: Use RCA cables or speaker-level inputs.
Connect remote turn-on: Connect to head unit remote wire.

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

First-Time Setup

Reconnect battery; power on system; adjust settings.

Set gain: Start at minimum, gradually increase to match head unit.
Adjust low-pass filter: Set according to speaker capabilities.
Set bass boost: Start at minimum, adjust to preference.
Check connections: Ensure all wires are secure.
Test operation: Play audio at various volume levels.

CAUTION! Do not set gain too high to avoid distortion and speaker damage.

Specifications

RMS Power: 200W (2 x 100W @ 4Ω)
Peak Power: 400W
Frequency Response: 20Hz - 20kHz
Signal-to-Noise Ratio: >85dB
Input Sensitivity: 200mV - 4V
Crossover: Low-pass 50Hz - 250Hz
Bass Boost: 0-18dB @ 45Hz
Fuse Rating: 25A x 2
Operating Voltage: 11-16V DC
Dimensions: 9.5" x 7.5" x 2.25"

Controls and Settings

Access controls via front panel knobs and switches.

Front Panel: Power LED, Gain control, Low-pass filter, Bass boost, Input selector.

Gain: Adjust input sensitivity (min to max). Low-pass filter: Set cutoff frequency (50-250Hz). Bass boost: Adjust low-frequency enhancement (0-18dB). Input selector: Choose between RCA or speaker-level inputs. Phase switch: Normal or reverse phase.

Connecting Devices

Power: Battery connection with fuse. Ground: Chassis connection. Speakers: 2-channel output. Audio: RCA or speaker-level inputs.

Disconnect battery before making connections.
Use proper gauge wire for power and speakers.
Ensure clean, secure ground connection.
Route audio cables away from power wires.
Connect remote turn-on to head unit.

Tip: Keep power and audio cables separated to reduce noise.

Operation

Designed for continuous operation in automotive environments.

Power on: System turns on with head unit.
Adjust volume: Use head unit volume control.
Monitor temperature: Ensure adequate ventilation.
Check LED: Blue LED indicates normal operation.
Adjust settings: Fine-tune gain and filters as needed.

WARNING! Do not operate with protective cover removed. Ensure proper ventilation.

Protection Features

Thermal Protection: Auto-shutdown at high temperatures. Short-Circuit Protection: Protects output stage. Overload Protection: Prevents damage from excessive current. DC Offset Protection: Monitors output for DC voltage.

Care & Maintenance

Keep amplifier clean and dry. Check connections periodically. Ensure proper ventilation. Inspect wiring for damage.

CAUTION! Do not use liquids for cleaning. Keep away from moisture and extreme temperatures.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. CE certified for European markets. Copyright © 2025 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 fuses.
No sound	Input/remote connections	Check RCA cables; verify remote turn-on; adjust gain.
Distorted sound	Gain settings	Reduce gain setting; check head unit volume.
Amplifier shuts off	Overheating/overload	Allow to cool; check impedance; verify wiring.
Protection mode	Short circuit	Check speaker wires for shorts; verify impedance.

Reset: Disconnect power for 30 seconds to reset protection circuits.

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