Amazon.com: ORION HCCA Series HCCA154SPL Extreme High Performance 15” Competition Grade SPL Car Subwoofer, 20000W Max Power, 5000W RMS, Dual 4-Ohm, 4” Voice Coil- Powerful Black Coil for Cars, Trucks, Jeeps :
Amazon.com: ORION HCCA Series HCCA152 - Subwoofer para automóvil de alto rendimiento de 15 pulgadas, grado de competencia, 10000 W de potencia máxima, 2500 W RMS, 2 ohmios duales, bobina de voz
Orion CO154S Cobalt Series 15" 4-ohm subwoofer at Crutchfield