In audio's past, folks have tried to get along without a subwoofer or subwoofers in the mix. From modern production capabilities to the intentional limits of excellent speakers, the guys explain that subwoofers are an essential part of great speaker systems.Touching on a few makes and models out there, Darren zeroes in on what type of subwoofer drivers make the most linear - or truthful - bass. He also touches on his upcoming DIY subwoofer project and outlines his choices for that.Duncan adds a few colorful examples to explain bass interactions with the room, and both offer a couple of wild and crazy approaches they've seen. The questions of how big, how loud and what type of subwoofer is best are dealt with, as well as a more modern quagmire: one subwoofer, or two? Or six?