The SRT system was Matthew Polks ultimate flagship prior to selling Polk Audio in 2006. 500 sets were produced in the 1990s. 250 were sold domestically with the other 250 sets sold overseas. Each SRT set cost $12,000 in 1995 ($26,000 in todays dollars) so you can see why they didn't need to produce a ton of them. I have two of the 250 sets originally sold in the US.
Each tower consists of a top satellite with 9 drivers rated at 1,000 watts. They sit on top of a separate cabinet with dual 10" 300 watt powered subwoofers. The weight of each 2 pc tower is 160 lbs. They utilized the famous Polk Stereo Dimensional Arrays (SDA) which allows adjustment of the soundstage. Each set came with a sound pressure meter to measure the loudness for safe listening levels because they are capable of damaging your ears. They can produce extreme pressure levels at over 120 dB. The bass is earth-shaking, hence the title "seismic system".
I've never heard anything better for home theater. Unlimited. Watching an action flick (especially modern war films) are incredible. Musically, they are very good too but there are better more acoustical speakers for just listening to music. It's hard to be the best of all worlds. Still the SRTs are pretty-amazing in either mode and are capable of delivering ridiculous amounts of window flexing bass and punch.
Each cabinet has been totally refurbished with new or rebuilt drivers. All 4 amps were rebuilt. The sub drivers were rebuilt by Polk about 16 years ago when they still had an office in Baltimore. Polk had the greatest customer service prior to then. They rebuilt all of the subwoofer drivers for free. That's right.. for free! All I had to pay for was shipping.
Over the years I intentionally accumulated a lot of NOS spare parts to ensure they will be working for years to come. Various NOS spare drivers and even two NOS complete subwoofer amps along with numerous other VHTF parts. Everything remains 100% Polk. No aftermarket parts.