Should I Buy Dual 4 Ohm or 2-Ohm?

When shopping for a subwoofer or planning a car audio build, one of the most confusing decisions is choosing Dual 4-ohm (D4) or Dual 2-ohm (D2) voice coils. Both seem similar, both offer wiring flexibility, and both can deliver excellent bass—but they behave differently depending on your amplifier and system goals. This guide breaks down