I guess plenty of folk have compared these side by side before, I was wondering how they compare. My father has some 603's that he bought new many moons ago and I have just bought some second hand 603 s3's. The cabinets are larger on the s1's which makes me think they will give more bass. I have spent the last 2 days listening to all types of music from my s3's, powered by a Marantz SR7001 amp and I love them. I am however going to have to get all speakers together and make a comparison.
p.s. How much were dm603 speakers back in about 1994 (I think that is when he got them)