JBL STAGE A3001 Mono Class D Car Amplifier

The JBL STAGE A3001 is a compact mono Class D car amplifier designed to power a subwoofer system. It supplies up to 300 watts RMS to a 2-ohm load, giving an aftermarket bass setup dedicated amplification without requiring a multi-channel amplifier. Its mono design keeps the focus on low-frequency reproduction for music systems that need added bass impact.

This amplifier is suited to drivers building a straightforward subwoofer upgrade or adding bass to an existing factory or aftermarket stereo. Both high-level and line-level inputs support integration with a range of source units. The included high-level input cable is useful when connecting to systems without dedicated RCA preamp outputs.

The STAGE A3001 is engineered for subwoofer duty, with a specified frequency response of 10 Hz to 320 Hz. A variable low-pass filter allows the subwoofer’s upper-frequency range to be adjusted from 32 Hz to 320 Hz. Bass EQ settings at 45 Hz provide further adjustment for the vehicle, subwoofer, and enclosure combination.

Its compact 50 x 145 x 241.6 mm chassis is designed for installations where amplifier space is limited. Input sensitivity controls help match the amplifier to the signal level supplied by the head unit. A phase selector provides another setup adjustment when blending the subwoofer with the vehicle’s other speakers.

The amplifier includes protection circuitry for DC, overvoltage, undervoltage, overcurrent, and overheating conditions. A power/protect indicator provides operating-status feedback. Use the STAGE A3001 with a properly wired 2-ohm subwoofer load and appropriate fused power wiring as part of a complete car-audio installation.

Key Features

• 300W RMS Mono Output: Delivers rated power to a 2-ohm subwoofer load.
• Class D Design: Compact mono amplifier format for subwoofer applications.
• High- And Line-Level Inputs: Supports factory or aftermarket source-unit connections.
• Variable Low-Pass Filter: Adjusts subwoofer crossover frequency from 32 to 320 Hz.
• Bass EQ At 45 Hz: Offers 0 dB, 6 dB, or 12 dB settings.
• Protection Circuitry: Monitors electrical, thermal, and short-circuit-related conditions.

Design & Installation

The STAGE A3001 uses a compact black chassis with grooved detailing, silver graphics, an anodized JBL badge, and orange end-panel accents. Its control and connection panels include screw terminals for power, ground, remote turn-on, and speaker wiring. A power/protect LED helps identify normal operation or a protection state.

Mount the amplifier securely in a ventilated location and follow the vehicle-specific wiring requirements for fused battery power, ground, remote turn-on, signal input, and subwoofer output. Use the high-level input cable for compatible speaker-level signals or the RCA line inputs for a low-level connection. Set gain, low-pass filter, bass EQ, and phase controls after installation to suit the connected subwoofer and system balance.