Amazon.com: Pyle PL53BL 5.25" 200 Watt 3 Way 4 Ohm Car Audio Triaxial Speakers (2 Pack) and PL6984BL 6x9" 400 Watt 4-Way Car Audio Speakers (2 Pack) : Electronics
Amazon.com: Lanzar 8in Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Stamped Steel Basket, 4 Ohm Impedance, 600 Watt Power and Rubber Suspension for Vehicle Audio Stereo Sound System - MAX8 (1 pack) : Electronics
Volt/Amp/Watt/Ohm - Calculator:Amazon.com:Appstore for Android
Amazon.com: Massive Audio HIPPOXL124 – 12 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 12" Subwoofer 2000 Watt RMS, 4000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Pyle 6.5 Inch Mid Bass Woofer Sound Speaker System - Pro Loud Range Audio 300 Watt Peak Power w/ 4 Ohm Impedance and 60-20KHz Frequency Response for Car Component Stereo PLG64 : Electronics
Amazon.com: American Bass 10" Competition Car Subwoofer, 3000 Watt Maximum Power, Bass Surround Speaker, Car Audio Stereo Subwoofer - 10 inch, Dual 4 Ohm Voice Coil : Electronics
Amazon.com: Pyle 6.5 Inch Mid Bass Woofer Sound Speaker System - Pro Loud Range Audio 300 Watt Peak Power w/ 4 Ohm Impedance and 60-20KHz Frequency Response for Car Component Stereo PLG64 : Electronics
Amazon.com: Pyle Car Mid Bass Speaker System - Pro 5 Inch 200 Watt 4 Ohm Auto Mid-Bass Component Poly Woofer Audio Sound Speakers For Car Stereo w/ 30 Oz Magnet Structure, 2.2”
Amazon.com: 5Core 8" Inch Subwoofer Replacement DJ Speaker Car Loudspeaker 100W 4 Ohm WF 8110G : Electronics
Amazon.com: BOSS Audio Systems BRS40 50 Watt, 4 Inch , Full Range, Replacement Car Speaker - Sold Individually : Electronics