Velodyne Impact-80-Min-BK 6.5 Inch 180 W RMS Subwoofer
Amazon.com: Pyle 6.5" Three-Way Sound Speaker System - 180 W RMS/360W Power Handling w/ 4 Ohm Impedance and 3/4'' Piezo Tweeter for Car Component Stereo, Round Shaped Pro Full Range Triaxial Loud
Musway BMW Upgrade Underseat woofer pair CSB8W 180w RMS for BMW | eBay
Buy Wholesale China Hy Audio-8′′ Subwoofer/car Speaker With Big Power With Rms 180w Max 350w/car Audio Speaker & Subwoofer at USD 16.2 | Global Sources