Big speakers with a big sound. The Peavey SP series loudspeakers have been a mainstay of journeyman sound reinforcement for three decades, and the SP 4BX is the latest incarnation of this ever-improving legacy. It has dual 15" woofers that are each voiced differently thanks to an efficient crossover that directs low frequencies to both woofers while limiting midrange frequencies to only the top woofer. Engineered for optimal sound reproduction with proven reliability, Peavey SP enclosures feature patented asymmetrical Quadratic Throat Waveguide technology that helps deliver pristine, precise sound; Black Widow® loudspeakers with Kevlar-impregnated cones, 4" ribbon-wire voice coils and exclusive field-replaceable baskets; the patented Radialinear Planar Phase Correction System; and titanium compression drivers with ferrofluid cooling. Ideal for medium-sized clubs and even outdoor performances, these enclosures can go up against a loud drummer, two guitars and a bass player on a big rig with ease. Reasonably lightweight, loud and clear, they are an excellent solution for today"s gigging bands. FeaturesQuasi-three-way, full-range, bi-ampable sound reinforcement system2000 watts program, 4000 watts peakPatented Asymmetrical Quadratic Throat Waveguide"cent; technologyPatented Radialinear Planar Phase Correction SystemSound Guard"cent; III tweeter protectionTwo 15 inch BWX Black Widow® 4 inch voice coil woofersSensitivity: 100 dB (1W/1m) anechoicFull-range inputs include a Neutrik® Speakon® 4 pin jack and two 1/4 inch phone jacksBi-amp capability via internal wiring jumperTrapezoidal enclosureHammerHead® durable covering materialRX"cent; 22 compression driver with ferrofluid coolingFrequency Response: 52 Hz to 17 kHz (+/- 3 dB)