Stax SRM-252 is similar in design to [I've heard] great SRM-323 but SRM-252 is full of mistakes (miscalculations), tradeoffs and savings, and when we talk about "the sound", SRM-252A is just a piece of crap(!!!) [sorry, but it's true as the sky is blue, comparing even to first solid and simple SRM-1 built in 1979], and I suppose SRM-252S is not a much better.
At http://www.head-fi.org/t/546221/srm252mod is a discussion what can be done to fix the sound of SRM-252A and maybe made our own SRM-252U (Ultimate) which will be as good as SRM-323S without having such big enclosure and without producing so much heat (small box), and of course still at an affordable price. Almost impossible, but worth trying.
Edited by borizm - 1/14/13 at 2:05pm