Quote Originally Posted by Poultrygeist
Feanor,

Excellent conclusions. You've got me interested but I'm looking at the lower power 224 versions. Do you think there's a significant difference between the CDA-224 and the SDS-224 kits?
The lower power, 224's and 254's have a really good rep. As for the CDA vs. SDS issue, the concensus is that the SDS has a small but significant sound advantage. The latter are also tuned for balanced input if that's something that matters to you; (it does to me because I have a fully balanced preamp). If my recollection is right, the SDS also has higher input impedance which is a good thing in general.

If you want a sub amp you'll probably would notice no CDA/SDS difference, but note that neither amp should used bridged into 4 ohms, and a lot of subwoofer drivers are 4 ohm. Actually, for sub amp, I'd go for their TI-300 or -600 amps that are fine bridged into 4 ohms. However according to Tom at Class-D-Audio the TI amps are not quite as nice sounding for full range use as either the CDA or the SDS amps.

For a lot of discussion of the CDA and SDS amps, see THIS thread at AudioCircle.