Pops I remember well the Polk SRS/SDA from the 80's and could not disagree with you more! Their bad rap is well earned. The bass on that speaker was horrendous and really overpowered the rest of the frequency range. Tonal balance was all wrong. Regardless of the SDA circuit being removed, I can't imagine too much of an improvement on the big speaker, the one that looked like a 6' coffin. Now that you remind me of it I would probably include that speaker among the worst especially for the 3k they were charging for it at the time. I did however like the smaller one in the SRS line that mounted on a bookshelf speaker, can't remember the model #. At the time around 1986, I did an audition with a pair of Fanfare speakers a 3-way design. The speaker was direct order from the manufacturer and offered a 30 day money back warranty. I was considering the stand mounted Polk at the time and wanted to do a comparison side by side. At 339.00 a pair the Fanfares (I can't remember the model name) handily beat the whole Polk line including their monitors and the SDA series. Even the salesman had to admit to it. I still have a pair of the Fanfare Preludes a 2-way which I used to use as surround speakers, they still sound quite good for their modest size. While we are on the subject does anyone remember the funny looking speakers that had wings on the bass, midrange and tweeter modules from a company called Tennessee Sound Company? They were the only speakers I can recall that Stereophile (Dick Olsher, I believe) throughly trashed. The company shortly thereafter went belly up.