The Beveridges 2SW-2 are one best speaker system during their time of introduction in the 1970s to the 1980s. The other only rivals are the Apogees Full Range and the Infinity IRS. I had my panels in the 2SW-2 upgraded by Mr. Harold Beveridge back in December 1986 and they are still working today March 2014.... And I also have the Apogee Full Range since 1987, they are quad-amped running with eight Krells KMA mono-blocksand two towers of six 12 inch woofer per tower. The Apogee and the Beveridge are like two beautiful women... Both are different, but both are great... Oh yes, the Infinity IRS? I had an opportunity to buy a used pair (divorce settlement - both lawyers, including a Ferrari) but I could never jellied with the IRS's sound upon long periods of listening and I heard many set ups... So...