Spj-161C2. 6-1/2" (16.5 cm) Coaxial 2-Way Speakers The entry level Type-J speaker series are an affordable way to upgrade your factory speakers or even to start building a sound system, for the excellent sound quality and performance you expect from Alpine. Built to handle all bass levels down to the lowest, their high efficiency means that you enjoy powerful bass sounds without distortion. Specification: Frequency response: 30 Hz – 30 kHz Power handling: 250 Watts peak power 50 Watts RMS power Design: Surface mount Application, Tweeter Rubber roll surround Material: Silk dome tweeter Neodymium Magnet for tweeter Ferrite Magnet for woofer PEI cone Dimension: Woofer mounting diameter : 123.5 mm Woofer mounting depth : 44 mm *By request/order.