Craving more power from your PA system? Add a subwoofer that delivers. The Thump15Sv4 shakes the floor with deep, room-filling bass that gets the crowd moving and keeps them there. Connect loudspeakers. Dial in the perfect low end. Feel the difference of a professional subwoofer that brings music alive with complex basslines and punchy kicks.A True Workhorse for Gigging ProfessionalsBuilt for demanding live sound use with a 1400W Class-D amplifier delivering up to 132 dB max SPL, a 15 inch high-performance woofer reaching down to 34 Hz for deep bass, and a rugged 'Built-Like-A-Tank' design that remains lightweight with integrated handles for easy transport and setup.Tailor the Bass to Your LoudspeakersConnect loudspeakers to the high-pass outputs and choose from four optimized modes, all featuring 1.4 ms alignment delay: Thump 12 mode (140 Hz crossover for Thump12v4), Thump 15 mode (110 Hz crossover for Thump15v4), Thump GO mode (150 Hz crossover for Thump GO), or Variable mode for fully manual crossover adjustment to match any loudspeaker system. Connect to Versatile Inputs and OutputsFeatures stereo XLR inputs for connecting a DJ controller, mixer, or other audio source, stereo XLR high-pass outputs for sending optimized signal to loudspeakers with selectable high-pass modes, and stereo XLR full-range outputs for chaining the full, unaltered signal to additional subwoofers for expanded system setups.Essential Subwoofer FeaturesIncludes a phase invert switch for optimal alignment, defeatable front LED with on/off control, stereo or mono summing for flexible single or dual subwoofer deployment, and a variable level control ranging from mute to +6 dB for precise output adjustment. Physical FeaturesBuilt with rugged, modern construction for long-lasting reliability in demanding environments, and equipped with integrated built-in handles for easy lifting, loading, and transport between venues.