Some great speakers have been mentioned in these posts! The early DCM Time Windows were one of the speaker pairs I wish I had never sold. I currently own a pair of DCM TimeFrame 250s and would have to find some money if a pair of the originals Time Windows appeared locally (the guy who has my original pair will never let them go!)

The Dahlquist DQ-10 speakers can be wonderful if they have been recapped and are driven with an amp that can throw a lot of current. I was driving one of my two pair with a Pioneer SX-1010 (110 watts per Ch) and they sounded pretty good, but they really showed what they could do when they were powered by my big Krell amp.

I am somewhat surprised that no-one has mentioned some of the classic Altec horn boxes. They are not my cup of tea but do have many fans out there.