Focal Sub 10 DualSUB 10 DUAL Double coil subwoofer If Sub 10 is a single coil subwoofer, Sub 10 Dual is dual coil. It thus offers a double mounting possibility and makes it possible to exploit the maximum power of the amplifier. Its robust design and the increasingly powerful bass it produces make it an excellent addition to your hi fi installation. POWER The subwoofer's double voice coil architecture allows parallel connection and operation at 2 ohms, so you can