I was a former dealer, still use them, have SP1s, SP 1/2Es, SP 2s, S-100s. The ones or one/2s are very good and often very reasonable. The 100s are very good in larger rooms, the twos in smaller ones. I use a pair of REL subs with mine. I think the older ones are the ones to get. I may be selling one of my S100 s pairs eventually.
