JL Audio RD900/5+

Product Overview

JL Audio RD900/5+ 5-Channel Class D System Amplifier with 3-Way Crossover (900W RMS)

The RD900/5+ is an all-in-one system amplifier engineered to power a complete car audio setup from a single compact chassis. It delivers 70 watts RMS x 4 channels for your speakers plus a dedicated 500-watt subwoofer channel (at 2 ohms), totaling 900 watts of clean, high-performance power. The "+" designation means this version adds onboard 3-way crossover capability, giving you more control over your system than the standard RD900/5.

Built on JL Audio's NexD™ switching technology, the RD900/5+ runs cool and efficient while pulling minimal current from your vehicle's electrical system. Each pair of main channels is fully bridgeable, producing 200 watts RMS into 4 ohms per bridged pair. This means you can run the amp in 5-channel mode for a full system, or switch to a powerful 3-channel configuration with 200W per pair to your front speakers and 500W to your sub.

The signal processing is where this amp really shines. Each channel section has its own 12 dB/octave crossover with continuously variable frequency selection from 50-500 Hz. The main channels get high-pass filters while the subwoofer channel gets a dedicated low-pass filter. With the 3-way crossover capability, you can run an active 3-way front stage without needing external processing. LED clipping indicators on each section make tuning fast and foolproof.

Features

NexD™ Switching Technology — JL Audio's proprietary Class D technology delivers exceptional audio fidelity and efficiency from a compact chassis, reducing current draw and heat while maintaining high-power output.

3-Way Crossover Capability — The "+" version adds onboard 3-way active crossover capability, allowing you to run tweeters, midrange, and subwoofer channels independently without external crossover hardware.

Dedicated Subwoofer Channel — Channel 5 delivers up to 500W RMS at 2 ohms with its own low-pass filter, purpose-built for driving one or two subwoofers with authority.

Bridgeable Main Channels — Each pair of main channels can be bridged to produce 200W RMS into 4 ohms, creating a powerful 3-channel amplifier configuration.

Differential-Balanced Inputs — Combats induced cable noise using standard RCA cables. Accepts both low-level RCA and high-level speaker signals from factory or aftermarket source units.

LED Clipping Indicators — Each channel section features LED indicators for quick, accurate gain setting without additional test equipment.

3 Turn-On Options — +12V remote wire, signal sensing, or DC offset detection for seamless integration with factory or aftermarket systems.

Selectable Input Configuration — 2, 4, or 6-channel input modes with selectable input type switches for maximum installation flexibility. Eliminates the need for Y-adapters when bridging.

Remote Subwoofer Control (Optional) — Compatible with the RBC-1 remote level control (sold separately) for convenient bass adjustment from the driver's seat.

Dual-Color LED Status Strip — Top-mounted LED light strip reports amplifier status: solid blue during normal operation, red during power-up mute or fault condition.

Specifications

* All power ratings measured at 14.4V input with less than 1% THD unless otherwise noted.

** Only connect 4-ohm loads to bridged terminals. Connecting 2-ohm loads when bridged may cause damage.

*** Use only oxygen-free copper (OFC) or tinned copper wire for power and ground connections. Do not use copper-clad aluminum (CCA) wire.

What's In The Box

• 1x JL Audio RD900/5+ 5-Channel Amplifier
• Protective Control Cover
• Mounting Hardware
• Installation Manual

• Ships within 1–3 business days from our warehouse
• Tracking included with every order
• Free 30-day returns if it doesn’t work for your setup

• 2-year manufacturer warranty
• Authorized dealer guarantee
• Real installer-backed support before and after purchase