Ok, some questions (and worries!) I've been having ever since I upgraded my HTIB to JBL speakers for the fronts (EC35 center, twin E80s for L/R) and an SVS PB10 for a sub: how can I ensure the longest life for these pricey components? I mean, how hard is it to "blow out" speakers? As far as volume, I'd say I definitely don't listen as loud as reference level (although louder than I watch regular TV). I also read here that it's best to run a sub a little hot and keep the receiver sub level a little lower to minimize distortion. I have my SVS set to the 2 o'clock position (about 3 tick marks from max) and my receiver subwoofer output set to -2 (or less if it's a really bass-intensive film). The thing is, I'm just wondering if I'm overtaxing my speakers and sub. Usually I have to adjust my receiver (a cheap Sony HTIB one) to level 50 (the master volume goes to 70) for it to be pleasingly loud (I have to compete with two noisy air conditioners). Is it easy to ruin speakers with this type of volume? **I know the SVS is built like a tank and made to withstand punishment, but I'm worried that I'm slowly shaking it apart from the inside or something **Also, concerning the SVS: what is meant by "bottoming out", and why is it bad? Also, how can I tell if it's bottoming out? Sometimes on very deep bass passages I can hear a kind of fizzy clicking, but it doesn't always sound like it's coming from the sub. Finally, is it a bad idea to keep the sub "on" all the time? Will it overheat or burn out? Apologies for the longish post and thanks in advance for any tips!