Active subwoofer. PROEL introduces the S Series, a new range of compact and powerful sub-woofers designed to complement PROEL full-range speakers. The variety of size, power and SPL offered by the four active S models provides, at an unbeatable price point, the perfect low extension solution for any speaker model available in the PROEL range. All the S models feature high-excursion woofers in a Hybrid Band Pass configuration (HBP). This innovative design provides a higher efficiency compared to direct radiation sub-woofers and, in addition, guarantees a much better coupling of the tuning ducts with the external air, reducing the distortion and the air turbulence, for a more defined sound and deep and punchy lows. The new CLASS D amplifier modules with SMPS (Switch Mode Power Supply) can generate a massive amount of continuous power in a compact, lightweight and reliable package. All the modules include a STEREO pre-amp section, 24dB/oct. crossover filters with selectable frequency and PHASE reverse switch. The cabinets are built with 15/18mm plywood and finished with extra-durable polyurethane paint. They feature two flush handles and four sturdy 75mm wheels for an easy transport. Features: Compact active HBP sub-woofer; 18” woofer with 4” VC for a deep and extended response; 1200 W peak power; Amplifier Continuous Power: 600 W; STEREO input, link and output; SPL MAX 131 dB; Frequency response 36 Hz - 160 Hz; Connectors: IN: 2 x NEUTRIK COMBO, OUT: 2 x NEUTRIK XLR-M, LINK: 2 x NEUTRIK XLR-M; Controls: Volume, GND lift; X-over Frequency, Phase; Power Supply: 230 VAC or 120 VAC 50/60 Hz; Weight: 36 kg (30.8lb); Cabinet: 15/18 mm plywood; Black anti-scratch paint, 1.5 mm metal grille; 2 handles; 1 x pole socket; 4 x 75 mm wheels; Dimensions: 508 x 630 x 645 mm