The KRK subwoofers S8.4, S10.4, and S12.4 build on the proven KRK sound precision and performance, delivering tight, precise, and defined bass, while their highly efficient Class-D amplifiers dramatically improve transient response, control, and punch. A wealth of connectivity options means you can connect practically anything without adapter issues, and a four-position crossover switch makes it easy to optimally adjust the subwoofer settings to your existing monitors. Enhancements in the latest generation of KRK subwoofers include slightly improved low-frequency extension, improved porting for significantly better phase response in the low-frequency range and reduced noise, a more durable dust cap, optional removable grills, redesigned cabinets with lower height profiles and reduced depth compared to their predecessors for improved placement flexibility, and a timeless design with a more professional aesthetic. Adding a KRK subwoofer to your existing monitors provides an optimized listening and mixing experience with extended bass. With a single button press or footswitch (optional), the subwoofer can be activated, allowing for an immediate listening comparison. The new KRK subwoofers not only deliver precise bass and a wealth of features, but they also represent the next dimension of subwoofer performance.