1. Do speakers ever become worn-out? I mean, like a TV as they age they start to loose color and brightness and so on. Does the same apply to speakers?

2. With my EP500 sub, im using the rubber feet instead of the spikes. Now the sub is in my living room on top of carpet. The reason im not using spikes is because my girlfriend dosent like the "sound" it makes when the spikes rip threw the carpet. lol. Am I loosing anything by using the ruber feet on top of carpet instead of the spikes?

Thanks and sorry for the dumb*ss questions.