The OPA-151SA is a powered subwoofer that houses a powerful On Point Audio 15-inch driver, two 1,000-watt peak Class-D power amplifiers and flexible DSP in a rock solid enclosure. Combining the OPA-151SA with various On Point Audio full-range speakers creates high output, wide-range, yet extraordinarily compact, unobtrusive powered sound systems. OPA-151SA’s two amp channels provide enough power for the subwoofer as well as for various On Point Audio full-range models. Inside the OPA-151SA is a powerful 15-inch woofer equipped with a large-format voice coil built by On Point Audio. Its premium Class-D European-designed amplifiers include fully equipped, user-adjustable DSP control with OPA-Net software for precise system tuning. The OPA-Net software includes five bands of fully parametric EQ, input and output delays, a dynamic loudness filter, variable crossover with adjustable low and high pass, as well as a range of dynamic filtering. The software includes a display of response tweaks and has built in white and pink noise generators for faster setup and testing. The OPA-151SA is equipped with factory presets for the OPA-5, OPA-8 NP, OPA-28NP and the OPALine-82 and it also has three user memory slots for various setups or applications. Powerful, yet compact, easy to setup, yet incredibly flexible, you can do more with the OPA-151SA.