Finally joined the ranks of SDA owners. I have had several Polks over the years, my favorite being a pair of NM Monitor 10b's I owned for a while. I saw a pair of SDA's sitting in the back of a local thrift last month. I asked the owner about them. He was going to "fix them and put them on ebay for $400". I asked how much as is. Would not sell them to me. I watched them sitting there for over a month. I walked in last Friday afternoon, there they were up front. Turned out to be a pair of SDA II's (SDA IIA's according to Helen at Polk). Marked $149 and with bad speakers written on them. They even had the interconnect cable. So I paid my money, loaded the up and headed home. They are in nice shape with only a few small dings. Got them home and was finally able to look at them proper Sunday night. There are 3 bad 6.5" drivers. I had one DCM 6.5, put it in, like what I here. I'll probably order the replacements today. Any idea what ohm they are suppose to be? I seen both 4 & 8 ohm listed. Anyway, I'll think I am going to love these speakers.