JBL BassPro SL2 8" Active Underseat Subwoofer 125w RMS

The JBL BassPro SL2 is an 8-inch (200 mm) active underseat subwoofer with a built-in 125W RMS (250W peak) Class D amplifier, standing just 71 mm tall. It's part of JBL's BassPro range and suits both factory and aftermarket head units.

The BassPro range is also available as the JBL BassPro Nano (100W RMS underseat) or the JBL BassPro 12 (12-inch enclosure, 150W RMS).

Key specifications

• Woofer: 8 inch (200 mm)
• Amplifier: built-in Class D, 125W RMS (250W peak)
• Frequency response: 35 Hz – 120 Hz
• Crossover: 50 Hz – 120 Hz, 12 dB/octave
• Bass boost: 0 to +9 dB at 70 Hz
• Inputs: line-level 0.05 – 2 V, high-level 0.5 – 20 V
• Dimensions: 344 x 250 x 71 mm
• Fuse: 15A
• Remote bass level control included

Compact underseat fit

At just 71 mm tall, the BassPro SL2 fits under most vehicle seats. Its ABS enclosure keeps the footprint small without compromising bass output — ideal for modern cars with limited boot or cabin space.

Efficient Class D amplification

The built-in Class D amplifier delivers 125W RMS with minimal heat and distortion-free output. The proprietary 8-inch woofer is optimised for low distortion within the compact sealed enclosure.

Flexible tuning and connectivity

A variable low-pass crossover (50 Hz – 120 Hz), bass boost, and phase switch let you dial in the bass to suit your system. Both RCA and high-level (speaker) inputs are included, so the BassPro SL2 connects directly to factory or aftermarket head units without additional hardware.