Rockford Fosgate T500-1BDCP 500W Mono Amplifier

The Rockford Fosgate T500-1BDCP is a mono car amplifier designed to power a subwoofer system with controlled, high-output bass. Its Constant Power configuration delivers rated output across 1-, 2-, and 4-ohm loads, helping simplify subwoofer selection and wiring options. It is suited to vehicle audio upgrades that need a dedicated low-frequency amplifier rather than a full-range multi-channel design.

Rated at 500 watts RMS into 1 or 2 ohms and 300 watts RMS into 4 ohms, the T500-1BDCP is intended for properly matched subwoofers and enclosures. The mono layout focuses its output on bass reproduction from 20 Hz to 250 Hz. A variable low-pass crossover helps blend the subwoofer with the rest of the system.

The amplifier uses a Class BD circuit topology with MOSFET power-supply and output stages. Its adjustable Punch EQ provides a targeted bass boost at 45 Hz, while the selectable infrasonic filter limits very low frequencies sent to the woofer. These controls give installers practical options for tailoring output to the vehicle, enclosure, and music preference.

RCA inputs support connection from a compatible source unit or signal processor, and RCA pass-through outputs can feed an additional amplifier without an extra long signal run. Balanced inputs are included to support noise-resistant signal integration. Power, thermal, and protect indicators provide at-a-glance operating status.

The T500-1BDCP fits naturally into a subwoofer-focused upgrade path for systems that need more low-frequency authority without adding extra amplified channels. It accepts 4 AWG power and ground wiring and uses heavy-duty speaker terminals for secure connections. Proper impedance matching, fused power wiring, grounding, and gain setup are important for dependable operation.

Key Features

• Constant Power Design: Provides rated output at 1-, 2-, and 4-ohm mono loads.
• Class BD Topology: Dedicated mono amplification for a subwoofer-focused system.
• Variable Low-Pass Crossover: Adjusts from 35 Hz to 250 Hz for system blending.
• Punch EQ: Adds adjustable bass boost from 0 to +18 dB at 45 Hz.
• Infrasonic Filter: Selectable 28 Hz filter helps manage ultra-low frequencies.
• RCA Pass-Through: Allows convenient signal daisy-chaining to another amplifier.

Design & Installation

The amplifier uses a cast-aluminum heatsink to dissipate heat generated by its circuitry. Nickel-plated power, ground, speaker, RCA, and remote connections are designed to resist corrosion and provide solid wiring contact. Status LEDs identify power, thermal, and protection conditions during operation.

Mount the amplifier securely to a rigid vehicle surface or amplifier rack with adequate airflow around it. Use 4 AWG power and ground cable, keep the ground connection short, and install the required external fuse within 18 inches of the battery. Connect a compatible RCA signal source, match the connected subwoofer load to the amplifier's supported 1- to 4-ohm operating range, and set gain and crossover controls carefully.