I have owned and heard a number of Dahlquist models - and if you can buy these in perfect shape for under $400 or so, you should. The DQ-10's have a somewhat irrational following, but the DQ-20's and up were wonderful speakers - don't worry about their "specs". They offer very smooth midrange, tight and ample lows, with slightly restrained highs (that I personally prefer to many "modern" bright-leaning speakers). They ARE somewhat power hungry. If you have less than a 100 watt, high-current amp you'll be missing the point.
Frankly I like the DQ-20's best of all, with some modification. IMHO, you are not likely to find more listenable, reasonably accurate, speakers in this price range.
In the older models - make sure the surrounds are intact, or assume you'll need them replaced in the not too distant future.
Hope this helps.
