No, this speaker system is defective by design. For one thing, Klipsch skimped out on the quality of the components on the ac to dc converter in the amplifier. They are exposed to heat higher than the parts are rated. This is most likely why the system has a measly 1 year warranty, while the non-computer speaker systems klipsch sells carries a 2 to 5 year warranty.
Look at the distribution of user reviews at amazon. You can see that half are at the lowest rating while the other half the highest. And the low ratings all complain of the same thing: total failure of the sub or speakers. Statistically speaking, this means something isn't right. Now look at newegg's reviews of the promedia ultra. The star ratings are more positive, but if you actually read the reviews they are negative (Newegg reviewers aren't the smartest). And again, all complaining of the same thing. Compare this to the amazon reviews of Logitech's G51 computer system and the Z-5500. All postive except for very few.
Look at the ongoing thread at Hardforum (its a popular computer related forum) with a whopping 264 replies so far and 42,000 views-- the most in that particular section of the website. You don't see this kind of thing with other speaker systems. Some people have even had their systems break numerous times!
The owner of the website that contains the schematics to these systems explains problems with them on his pages.
And finally, look at this guy on e-bay talking at length about the heat issue.
What's really depressing is that the higher rated components which could prevent the damage to the rest of the amp cost about a dollar or two more than what they used! Klipsch became greedy and, because of that, ruined many hundreds, if not thousands of people's audio systems and wasted tens of thousands of cumulative hours of their customer's time. Instead of issuing a recall, Klipsch decides to discontinue the system and sweep the problem under the rug. Personally, I will never buy another item from them again and I will tell everyone who asks about this company not to buy from them. The management should be ashamed of themselves.