Memorial Day is being good to me. Brother brought over his Schiit Bifrost DAC and Joule LA-100 Tube Preamp. We are using a Marantz CD5004 as a transport and have everything running through a Adcom GFA-555 amp along with my SDA TL2Bs. What a difference the preamp makes. The Joule has such a great soundstage, detail, and liveliness that my GFP-565 does not have. Of course there is about $1,500 difference in the two so it should make quite a bit of difference. We also have been playing with the USB port on the Bifrost to PC. It really sounds good and makes me realize that listening to music on a PC is definitely a reality and can sound good. Great even. A very fun day in the air conditioning (95 degrees here).