The addition of a subwoofer or subwoofers to a hifi system can be game-changing. Frequencies all over the spectrum can be made  more clear and understandable with the support of existing sub frequencies to complete the transient music information.But none of that happens until the sub or subs are integrated properly with the speakers, blended in a way that their waves add to rather than detract from the main speakers.In this episode of The Hifi Podcast, Darren and Duncan go through the steps of subwoofer integration, from placement to level and crossover adjustment.Also in this episode, the guys answer listener questions about output transformers and turntable isolation, and at the end they show off the album of the week. This week's pick features a young guitar player from New York who rips through a set of jazz standards with a delicious-sounding hollow-body guitar.