Whether upgrading your car's current audio system or replacing ... With a retail price of $149.99, the 4-ohm subwoofer features an impressive build quality for top performance and durability.

Further upgrades to the music system:Added a sub woofer to the set up and now the system is breathing. However, the stock HU ...

The design was conceived by [Bill Fitzmaurice] who thought there needed to be a better way to use the subwoofers which ... [Bill] charges for the building plans, but we don’t mind living ...