The woofers in the TSX550t are not passive...
the tweeters are very overrated (power-wise)
and, if not too late, I might suggest going in a different direction other than polk audio speakers... here is why....
I own a pair of the Polk Audio TSX550t 's and use them as my fronts in a home theater system (5.1 at present, but will be going to 7.1 soon)
my set-up =
Panasonic GT50 - 60 inch plasma
Pioneer Elite SC-05 AVR
1 Polk Audio CS20 center channel
2 Polk Audio TSX550t 's front channels
2 Polk Audio Series II Monitor 70's rear channels
1 Polk Audio PSW 505 sobwoofer
I jumped into the Polk Audio speakers going by name and supposed reputation only. I wish I had gone different, but i have what I have...
a few of the lessons I have learned (the slightly expensive way)
1) I can not speak on every other polk speaker out there, but on the TSX's, I have replaced the tweeters 3 times so far, and have only had the speakers 6 months or so. Polk wont give out the spec's so that I can choose a after market replacement, so I will stick with the original style as polk sends me new ones as I burn them out... under the 5 year warranty. the tweets in all 5 speakers seem similar, (I have replaced them in each the fronts. rears and center) the tweeter itself is a soft dome/silk design, and weighs in at around 1 and one half ounces..... very weak
The woofers in the TSX's are driver, as while replacing tweets there, I removed all speakers to have a look, they are both wired in series
2) When you set up a newer AVR, you have to select what size speakers you are running, Large or Small. If you select Large, the whole range of frequency is sent to the main speakers, and no signal is sent out the sub output... this makes owning a subwoofer pointless, or you can select the speakers as Small in which case, all the lower frequency is sent to the sub, and no low frequency to the floor speakers (or at least not enough to make any difference ), now if you set your sub at 80HZ and under, you loose all the frequency range from 80 Hz up to wherever the mids kick in (maybe around 1500 Hz or so) so this makes buying floor standing speakers that have woofers built in a waste of money.... I have not tried wiring the front speakers to pass through the subwoofer speaker level terminals yet, that is the last option I have to make all the woofers work. I have also considered changing out the crossovers in the cabinets and wiring the woofers as low mid's and running the existing mids as high mid's...
3) I think if I start another HT setup, I will probably give Klipsch a strong looking at... it seems their speakers are rated better... but as to the ratings, manufacturers have found ways to re-word the ratings so that they can manufacture in cheaper methods and it still looks good on paper.
now, before the replies come in, stating that I am overdriving the Amp and sending clipped or distorted signals, look up the Pioneer SC-05 AVR, it uses the B&O designed ICE class D amp with the Nielsen corrective network. to summarize the reading for you, set at safety level 2 it will not allow the amp to clip or distort over 0.05 thd at 130 watts per channel (and yes, the Elite pushes 130 watts per channel with all channels driving)...
What is blowing the tweets is the fact that there is not enough winding to dissipate the heat associated with the power load.
Also with the Polk Speakers, I do occasionally hear a voice coil former slam into the back plate. Now, these floor standing Polk Audio speakers are rated to handle 300 watts continuous (on paper) so I should not be having any of these problems, but I do.
to wrap it up... Original Poster, give a look at the Klipsch Folded Horn speakers. If you like good sound, and like to run the volume up, they may suit your needs...