re capping

for the past 6 years i only use my equipment like 6 hours a week. should i worry about the 'caps'??

When it's time to change the power supply caps, your amp will let you know with a loss of bass definition soon followed by buzzing/humming. Until then, leave it alone if it works and there is no sign of physical damage.

And when it does so with a loud bang it is too late to save your expensive speakers.

Capacitor goes with loud bang because of avalanche effect. Capacitor is charged in narrowed current spikes of very high amplitude. That creates losses and heat with ESR of capacitor. When capacitor dries out ESR increases causing bigger losses and bigger temperature increase. Since temperature also increases ESR at one point it will lead to explosion. Because of that all electrolytic capacitors have some form of fuse. I agree with gs5556 - you will hear loss of bass definition and 120Hz buzzing way ahead of that.

or the past 6 years i only use my equipment like 6 hours a week. should i worry about the 'caps'??

Not for at least 20 years.

Just relating my experience. I purchased a pair of Polk SDA-SRS speakers from the 1980's just a few years ago (4 tweaters, 4 mid and 4 SDA drivers and a large passive radiator). I have always enjoyed the tremendous sound stage of this technology since I first heard a pair in a hi-fi shop shortly after they were released. There is a large SDA following on the Polk forum. One of the outcomes of this group is that some of the technically talented have put together several items to 'upgrade' these rather old speakers. The most significant upgrade is to recap the cross-over, and there are schematics for each of about a dozen SDA speaker models that were built during this time. When I got them setup I thought they sounded great for a relatively old set of speakers. Good sonic attributes, but a soundstage with more width, depth and vertical than I have ever heard. But I decided to rebuild the crossovers using the high-end caps as suggested by the forum members. When I finished and fired them up for the first time, it was like someone took a very thick audio absorbing blanket off from over the speakers. In spite of what I appreciated as great sounding speakers, and I auditioned some $10-$15k speakers prior to purchasing these, it is hard to describe the improvement of every sonic aspect with the new and upgraded caps. My point is not the SDA speakers, but the sonic improvement due to the upgraded caps. I have not done anything similar with electronics, i.e. amps. But if it is anything like I experienced with speakers, it is well worth the investment.