Directed 1100D Amp Manual

The Directed 1100D is a high-performance monoblock car amplifier designed for subwoofer applications. With 1100 watts RMS power output, advanced thermal protection, variable low-pass crossover, bass boost control, and remote bass level control capability. Features include MOSFET power supply, speaker-level inputs, variable phase control, and protection against short circuits, overload, and overheating. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

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

Features at a Glance

Key components: Monoblock amplifier chassis, Remote bass control, Power/ground terminals, Speaker outputs, Input connections, Control knobs.

Feature	Description
Power Output	1100 watts RMS at 1 ohm
Low-pass Crossover	Variable 50Hz-250Hz
Bass Boost	0-18dB boost at 45Hz
Phase Control	0-180 degrees adjustable
Remote Bass Control	Included for level adjustment
Input Sensitivity	200mV-6V adjustable
Speaker Level Inputs	For factory radio integration
MOSFET Power Supply	High-efficiency design
Thermal Protection	Auto shutdown if overheated
Short Circuit Protection	Automatic circuit protection

Installation

Unpack and inspect contents. Choose secure mounting location.

Disconnect vehicle battery: Remove negative terminal first for safety.
Mount amplifier: Choose solid surface with adequate airflow.
Connect power wiring: Run 4-gauge power cable from battery with fuse.
Connect ground: Use short 4-gauge cable to clean chassis metal.
Connect RCA inputs: From head unit to amplifier inputs.
Connect speaker outputs: To subwoofer(s) with proper impedance.
Connect remote turn-on: Blue wire from head unit to REM terminal.

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

First-Time Setup

Reconnect battery; power on system; adjust settings.

Set input sensitivity: Turn gain to minimum, play music at 3/4 volume, adjust until distortion.
Adjust low-pass crossover: Set between 80Hz-120Hz for subwoofer applications.
Set bass boost: Start at minimum, adjust to preference.
Adjust phase control: Set to 0 degrees initially, adjust if needed for phase alignment.
Test remote bass control: Verify operation and range.

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

Specifications

RMS Power: 1100W x 1 @ 1 ohm
Peak Power: 2200W maximum
Frequency Response: 20Hz-250Hz
Signal-to-Noise: >95dB
Crossover: Variable 50Hz-250Hz low-pass
Bass Boost: 0-18dB @ 45Hz
Input Sensitivity: 200mV-6V
Fuse Rating: 120A external
Operating Voltage: 11-16V DC
Dimensions: Standard amplifier chassis size

Controls and Settings

Front panel controls: Input sensitivity (gain), Low-pass frequency, Bass boost level, Phase adjustment, Power/protection indicators.

Remote Bass Control: Separate wired controller for bass level adjustment from driver position.

Input Sensitivity: Adjust to match head unit output. Low-pass Crossover: Filter high frequencies from subwoofer. Bass Boost: Increase low bass response. Phase Control: Align subwoofer phase with main speakers. Power Indicator: Blue LED when powered. Protection Indicator: Red LED when in protection mode.

Connecting Devices

Power: Battery connection with fuse. Ground: Chassis connection. Inputs: RCA or speaker level. Outputs: Speaker terminals. Remote: Turn-on lead.

Disconnect battery before any connections.
Use proper gauge wiring for power and ground.
Connect RCA cables away from power wires to avoid noise.
Ensure secure speaker connections with proper polarity.
Test system before final mounting.

Tip: Keep power and signal cables separated to prevent engine noise.

Operation Guidelines

Designed for continuous subwoofer operation.

Power sequence: Turn on head unit first, then amplifier.
Volume control: Increase gradually to desired listening level.
Bass adjustment: Use remote control for real-time level changes.
Crossover settings: Adjust based on vehicle acoustics and speaker setup.
Thermal monitoring: Amplifier will protect itself if overheated.

WARNING! Do not operate with impedance below 1 ohm. Avoid clipping distortion.

Protection Features

Thermal Protection: Auto shutdown at high temperatures. Short Circuit Protection: Detects output shorts. Overload Protection: Prevents damage from low impedance. DC Offset Protection: Monitors output for DC voltage. Under-voltage Protection: Shuts down below 10V.

Care & Maintenance

Keep amplifier clean and dry. Ensure adequate ventilation. Check connections periodically for corrosion or looseness.

CAUTION! Do not block ventilation ports. Avoid water exposure. Disconnect power before cleaning.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for vehicle use. 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	Wiring/fuse	Check power and ground connections; verify fuse; check remote turn-on.
Protection mode	Overheat/short	Allow to cool; check speaker wiring for shorts; verify impedance.
No sound	Input/settings	Check RCA connections; verify input source; adjust gain setting.
Distortion	Gain/clipping	Reduce gain setting; check head unit volume; verify power supply.
Engine noise	Grounding	Improve ground connection; reroute RCA cables; check alternator.

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

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