Features • High Power Mono Subwoofer Amplifier • High Current Design • 800 Watts @ 2 Ohm • MILC™ Maximum Input Level Control (Patent Pending) • 24 dB/Octave Linkwitz-Riley Alignment Crossover • GTO Signal Sense • PFM Subsonic Filter • Line-Level RCA Inputs and Active Speaker-Level Inputs • Solid One-Piece Aluminum Chassis • Optional wired ACR-1 Remote Control for Subwoofer Level • AccuBASS® Bass Restoration • Filled with home-grown audio goodness HIGH-POWER SUBWOOFER AMPLIFIER Quick
Important Safety Instructions 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. Do not install near any heat sources such as mufflers, silencers, exhaust pipes, or other apparatus (including amplifiers) that produce heat.
Connection Panel Features 1 2 3 4 5 1. Fuses 40A – Replace the fuses only with the exact same style and Ampere rating. Disconnect 12V power before changing or inspecting the fuses. 2. Power Input Terminal +12V – This screw terminal connects to the +12V battery binding post of the vehicle. Use quality insulated wiring of the recommended wire gauge, such as wire gauge 4 or thicker. Thinner wire may cause an overheating hazard due to the large currents involved. 3.
6. RCA Analog Line-Level Inputs – The line-level output from the head unit or factory installed radios can connect here, so the LC-1.800 will receive the line-level audio signals. The left and right signals are summed internally to produce a mono subwoofer signal. Do not use the speaker-level inputs if you are using the RCA line-level inputs. 7. Remote Control Connector – This connects to the optional ACR-1 remote control and allows you to remotely control the output level. 8.
Control Panel Features 9 10 11 12 9. Power LED – If you have connected your battery power, vehicle ground, and turn-on lead (or GTO signal sensing) correctly, then this light should be green to indicate the power is ON. An internal blue glow will also emanate from the heatsink area to indicate that the power is ON. There are times when this blue glow will flash, such as during power-up, and when the protection circuits have detected a problem. 10. Protection LED – The LC-1.
13. Crossover Frequency – Since component speakers (like woofers) are designed to reproduce certain frequency ranges, a crossover allows you to match the speaker to the appropriate frequency range. Most manufactures list a recommended crossover frequency as part of the speaker specifications. Choosing the correct crossover point will provide increased speaker reliability and optimum sound quality. The LC-1.800 amplifier comes with an adjustable-frequency 24/dB Octave Linkwitz-Riley crossover.
Quick Start 1. It only takes a few steps to get your LC-1.800 amplifier up and running! 8. Connect your audio inputs to the unit – either speaker-level or line-level RCA… not both. 2. Undo the +12V and Ground connections to the car battery before making any connections to the amplifier. 9. Run the optional ACR-1 remote to the front of the vehicle to adjust the bass level on the fly. 3. When making connections, designate red RCA plugs as right, and designate white, black, or grey plugs as left.
Power Connections In this example, the head unit has a +12V trigger output that is connected to the LC-1.800 remote input terminal. When the head unit is turned on, it will turn on the LC-1.800 amplifier. Head Unit Remote Amplifier +12V Trigger Alternatively, the GTO signal sense feature can be used to gently turn on the LC-1.800 amplifier when an audio input signal is detected. (The connection to the LC-1.800 remote input terminal is not required when using the GTO signal sense.
System #1: Adding a Subwoofer to a Factory Radio using Speaker-Level Inputs Factory Radio Speaker-level output + ACR-1 (optional) + Subwoofer 9
System #2: Adding a Subwoofer to an Aftermarket Head Unit using Line-Level Inputs Aftermarket Head Unit ACR-1 Line-level outputs L/R + (optional) L/R + Subwoofer Quick Start Guide
ACR-1 Dash Control Installation Top Lid Removal The top lid must be removed to gain access to the controls, and then put back on again to protect the controls from dust bunnies. Removal Procedure 1. Locate the two screws that hold the straight edge of the lid onto the connector side of the amplifier. 2. Use the supplied hex key to loosen both screws just enough until this edge of the lid can lift freely up just a little. (There is no need to remove the screws all the way, in case you lose them.) 3.
Specifications All specifications are measured at 14.4 VDC (standard automotive voltage). As technology advances, AudioControl reserves the right to continuously change our specifications, like our Pacific Northwest weather, although we are working on changing that as well. The LC-1.800 Amplifier Power Output (RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 Watts @ 4 Ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
