The Yamaha KS-SW100 is a subwoofer specifically designed for Yamaha keyboard models, including the PSR-A3000, PSR-EW400, PSR-S970, PSR-S770, and PSR-S670. Featuring Yamaha's Twisted Flare Port technology, this subwoofer enhances bass clarity and reduces port noise for cleaner reproduction of low frequencies. The system is equipped with a 20 cm (8 inch) cone woofer that delivers full, powerful sound with a frequency range of 28-200 Hz, providing deep bass extension for keyboard performances. With a dynamic power of 100 W at 5 Ohms and an output power of 50 W (100 Hz, 5 Ohms, 10% total harmonic distortion), this subwoofer offers significant reinforcement for keyboard audio systems. Its compact yet substantial cabinet design is suitable for various room configurations while maintaining consistent audio quality. The KS-SW100 seamlessly connects with compatible Yamaha keyboards, enhancing the overall sound experience with added depth and richness during musical performances. The multicolored finish and streamlined appearance integrate well into home studio setups and performance environments. This subwoofer is designed for reliable, consistent bass reproduction for keyboard enthusiasts and musicians looking to expand their sound system capabilities. The unit is sold as a standalone piece with all necessary components for immediate integration with supported Yamaha keyboard models.