There must be something wrong with me or my system I've never had my system sound good with 5 minute warm up. Most of my a/b amps that double in power take 2 days, I leave them on 24/7. A day or 2 for tube CD player, solid state CD player is left on 24/7, I think Dac's needs a couple days. My tube amps and tube Preamp take a couple hours. Class D takes 4 or five days, I leave it on 24/7. Turntable takes one or two albums to shine, maybe oil in well or cartridge need a little time. Other people don't have this problem?