Pioneer TS-W307D4 review
30cm DVC (Dual Voice Coil) Subwoofer
For most enthusiasts, the 12" (30cm) size is the subwoofer of choice. This model combines superior materials, engineering and acoustic performance to capably support its 1,200 Watt power handling.
The Dual Voice Coil design (2 x 4 ohms) means that the sub can be connected up as a 2 or 8 ohm load to your amplifier, thereby maximising the output power of your chosen amplifier. There are clearly marked terminals for the two voice coils, allowing easy connection in a series or parallel configuration.