Kenwood puts their most advanced technology into the Excelon subwoofers, so you can enjoy reliable high-performance bass in your ride. The oversized XR-W1204 12" sub is designed to move more air than a standard sub, which means more sound in your vehicle. It comes equipped with an oversized polypropylene cone attached to a heavy-duty rubber surround that allows for extra excursion, so it'll faithfully reproduce those low notes. The XR-W1204 is rated to handle up to 400 watts RMS so you know it's ready to rock. A dual ventilation system forces heated air out of the motor structure through the back and the sides of the housing, so the sub stays cooler during extended play. This ventilation system also allows this sub to operate in a shallow enclosure, good news if you're building a box to go in a tight spot. Install this Kenwood in a suitable box, hook up a nice amp, and you're ready to rumble. eXcelon SPEAKERS Speakers may be the most important piece of the sound quality puzzle. eXcelon speakers employ oversized drivers to enhance low-end range and large tweeters that improve mid- to high-range transitions, ideal for clear and dynamic vocals. Oversized woofers provide quick response and offer stable and powerful bass that remains true to the original recording. Test and Measurement Speaker and subwoofer development requires a diligent testing process including an anechoic chamber, power testing facility and the most advanced desktop applications for design and simulation. These high standards allow KENWOOD eXcelon speakers to deliver their expected performance and have long term reliability so your music can be enjoyed for many years. Oversized Diaphragm Low frequency output is increased because of a larger cone size. The cutout diameter has remained the same making this feature of the new XR woofers ideal for most vehicles where space is a premium. The XR woofers are ideal for a small sealed box. Reinforcing Ribs (Cone) The newly designed cone features ribbing that adds strength to the cone and minimizes distortion. Strong Magnetic Circuit Our engineers designed a strong magnetic circuit with the purpose of reproducing deep low frequencies. Their efforts employed a large magnet and optimized yoke. Stress-free Spider By adopting a "Stress-free Spider" and a "Thermal Efficient System" the mechanical and thermal durability has been improved dramatically delivering smooth and strong bass sound with long lasting reliability. Peak Power: 2000 W RMS Power: 400 W Frequency Response: 32Hz-300Hz Impedance: 4 Ω Mounting Depth: 5-5/8inch