Pleasant Surprises

Sometimes you buy one tweak or another and it doesn't work as advertised. So there's a lot of frustration. Other times you buy a tweak that offers an unintended benefit.

I have a Krell FPB 600 power amp. It is a beast that puts out enough heat to warm small countries. Whenever I turn on the home theater, my den gets uncomfortably warm after a few minutes. So, I recently installed a Parasound Zbreeze to help manage the heat. I was amazed at the results. The ambient temperature in the room seemed 10 degrees cooler. My wife even noticed. I can't wait to get some for my tube gear.

So, which tweak has pleasantly surprised you like that?