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PROEL S12A Active Subwoofer — Compact HBP Low-End for Mobile PA

The PROEL S12A is a 305 mm (12") active subwoofer from PROEL's S Series, built to extend the low end of compact PA systems. Its Hybrid Band Pass (HBP) enclosure couples the tuning ducts more efficiently with the surrounding air than a direct-radiating design, lowering distortion for cleaner, more controlled bass. At 19 kg, this model is light enough for one-person transport yet still reaches 127 dB of maximum SPL — enough headroom for small-to-mid venues, mobile DJs, and live bands.

Hybrid Band Pass Cabinet and Class D SMPS Amplification

The HBP cabinet uses tuned ducts that improve acoustic coupling with the room, tightening low-end articulation compared with standard bass-reflex designs. A Class D amplifier module with Switch Mode Power Supply delivers 600 W continuous (1,200 W peak) from a compact chassis, while a stereo preamp, 24 dB/oct crossover filters, and a phase reverse switch give precise system tuning on the fly.

Driver Performance and SPL Headroom

Driver and acoustic output determine how loud and deep the sub can play without strain.

• LF Driver: 305 mm (12") high-excursion woofer with 76 mm (3") voice coil — extended cone travel for clean output down to 43 Hz
• Max SPL: 127 dB — headroom for small-to-mid venues and DJ setups
• Frequency Response: 43 Hz – 160 Hz — covers kick, bass guitar, and low instrument fundamentals

Built-In Amplifier and Processing

Onboard amplification removes the need for external racks and outboard crossovers.

• Amplifier Type: Class D with SMPS — high efficiency in a compact, lightweight module
• Continuous Power: 600 W, Peak Power: 1,200 W — sustained output across full sets
• Crossover: 24 dB/oct with switchable high-cut (100–160 Hz) and 180° phase reverse — clean hand-off to satellite tops

Connectivity, Build, and Portability

Connection options and cabinet construction define how the sub integrates into a rig and survives the road.

• Inputs: 2 x NEUTRIK COMBO (XLR/jack), Outputs: 2 x XLR line out + 2 x XLR link out — flexible stereo or mono routing
• Cabinet: 15/18 mm plywood with anti-scratch polyurethane paint and 1.5 mm metal grille — built for daily transport
• Dimensions: 360 x 500 x 520 mm, Weight: 19 kg, Pole Mount: 36 mm flange — compact footprint with two flush handles