I believe that mine have been on continuously since about 1996. Save for power failures. Just too difficult to plug that big old power block into my switcher. That and I'm too lazy to reach over and turn the knob off. Brad Loomis Los Angeles, CA How do listees handle turning on and off power to speakers? Leave power on? Turn it on and off each time turn computer on and off? Some setup to get speakers power when computer is turned on? Demetri Kolokotronis ________________________________________________________________ Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://freepctech.com