Amazon.com: Pyle 10" Car Audio Speaker Subwoofer - 1000 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 4 Ohm, 50 oz Magnet, 2
Amazon.com: 200W Pure Bass Subwoofer Crossover Second-Order Crossover Frequency Distributor Divider 2 Way Speaker Audio Crossover Filter : Electronics
Sound Storm (SSL) EV2.1000 Evolution Series 1000 Watt 2 Channel MOSFET Amplifier 2 Ohm with High-Low Crossover and Remote Subwoofer Control
ATI Pro Dual 18" Speaker Crossover Networks, 1000 To 1500 W
IWISTAO 3 Way Crossover 1000W 0.8KHZ 3.5KHZ Professional for 12/15-inc – IWISTAO HIFI MINIMART
Amazon.com: LANZAR Upgraded 3-Way Electronic Audio Crossover - Network Hi-Pass and Low-Pass Channel 12dB Octave Slope Power LED Indicator w/Remote Subwoofer Control and Parallel Input Switch - Vibe VIBEX6, White