turn off...

Agree OPPO 105 gets a little warm. Seems whether to turn it off or leaving it on would depend on what ways and how often you use it. The 105 offers a wide array of functions and is pretty good to exceptionally good at them. I power down my equipment at bedtime and turn it on with the coffee pot. Suggest adding a truly better (not just more expensive) PC, PC connector and power supply upgrades and (the biggest difference maker) a tube buffer with better tubes and cables between OPPO 105 and the preamp. These cost-sensible upgrades (mindful that the 105 is built to do a lot at it's price point) did help the OPPO as a source sound less digital and more open and authentic- like real people playing music on real instruments. I'd caution against over spending on a nice but still a mass produced price point piece.

Not enough I guess to warrant leaving it on 24/7...which I did for couple/three weeks...off it goes...

ill turn on a couple hrs before listening...

When you turn it off, it goes into standby mode. It won't be a cold start.

cool...thanks guy for responses...

My problem is I can no longer fall asleep if there is no music playing. So I put a CD on the bedroom system, fall asleep, and the system is on all night, just idling. At least that system isn't tubed! When I was a kid living with the dad, I'd fall asleep with phones on, and wake up with the "needle" thumping against the LP label, and my ears sore from the phones (Koss Pro 4AA's---ouch!).