Check the listing for details. DS18 Pro-CFX Crossover Two Way Passive 300W Car Audio 2 Pack. Color: Black, Condition: New, Made in China. Listed at 59.95 USD. With DS18's PRO CFX, you can make your own passive setup and use the speakers of your choosing for an amazingly full sound. This is a 2 way passive crossover that lets you choose a mid-woofer 8" and under for the midrange and a tweeter for the high range. The crossover is rated for 300w RMS so you will be able to get great sound at a high volume with great frequency crossover point accuracy. These are the perfect addition for anyone looking to add a passive crossover utilizing only 1 channel on your amp and separate a full range signal for both components. These are Two-Way Passive crossovers manufactured by DS18. The upper cover is made of steel, and the lower cover is made of plastic. Read the specifications below for more information.