Orion CBW104S 10" 300W RMS Subwoofer SVC 4-Ohm

Diablo DB-10D4 10" 900W RMS Subwoofer DVC 4-Ohm

DS18 ZXI-354 3.5" Car Speaker Audio Full Range with Kevlar Cone 120 Watts 4 Ohm

Nemesis Audio NA-10D4 10" 500W RMS Subwoofer DVC 4-Ohm

B2 Audio 2" 4-Ohm Rampage RC2 Mini Subwoofer for 1:10 Scale RC Cars

Orion XTR8SWD4 8" 300W RMS Shallow Subwoofer DVC 4-Ohm

Audiopipe TXX-BDC-I-12 | 12" 600W RMS Subwoofer SVC 4-Ohm

2X AUDIO360 6.5" 650 Watt 4-Way Car Audio Coaxial Speakers with Grill AD6510PX