Professional audio SRX series stage subwoofer speaker The SRX718DSP is a 18in active pa speaker . It is a professional speaker subwoofer,features a 18-inch Differential powered subwoofer with a 4-inch voice coil, delivering a frequency range of 40 Hz to 220 Hz. The speaker is powered by a 1000-watt Class-D amplifier, providing a maximum SPL of 133 dB. The 18in stage SRX subwoofer also includes a built-in crossover and polarity switch for easy integration with other speakers. Its rugged construction and durable finish make it ideal for use in live sound reinforcement, DJ events, and installations where high-quality bass is required. Type: 2 Way Bass-reflex Frequency range: 40-220Hz Powe Rating: 1000W RMS Lower Driver: 18”(V.C:100mm+100oz) High Driver: / Ampl…