I put 5 CDs on my stereo, about 4:45 pm, to listen to while doing my work around the house and in the kitchen, and it just ended at about 10:55 - just over 6 hours! The CDs were by Clint Black, Vern Gosden, Sweethearts Of The Rodeo, Dwight Yoakam, and the Bellamy Brothers. I usually just pull these out at random, but I pulled out one of the Sweethearts Of The Rodeo, just to get a female (don't have as many of female artists).
I have some wires going to speakers down to my basement, and up to my bedroom, where I can switch to, but the basement where I usually have the second lines going.