i've listened to my iPod through my Teac CD-P650>Entech 205.2 DAC, with Jitterbug installed between the Teac and the Entech; and, i've listened in another system with a laptop Foobar> Dragonfly>Yamaha preamp>Trends Audio amp with Jitterbug installed before the Dragonfly. in both cases i've heard much more bass...i think. gotta spend some more time on it, but i wonder if any other Jitterbuggers have heard this?