In my 12' x 12' room, the 45 DRD makes some very nice tunes via my 86 db efficient speakers (maybe "efficient isn't the word). No magic here: The speakers seem have an SET-friendly impedance, and I'm not filling a large space with sound. Now if I want to get a little rowdier and share music with the living room, then the amp's simply going to run out of gas and sound a bit hard and compressed (whereas a 300b, like the Energizer bunny, keeps going and going). And yet, not many amps out there will have singers whispering sweetly and breathily into your ear as the 45 DRD will! Darned things are practically tactile. I particularly like solid state rectification with these DRD amps, BTW.I'm not familiar with that ASL amplifier, but if it functions as a PASSIVE, resistive line stage, you may need to do some experimentation to find a set of cables (and an appropriate length of them) which gives you the best sound. Passives have been kind of frustrating to me because while they sound very "clean" and are of course quiet, I suspect they're also very touchy about the choice of output cables and so far, I haven't come up with something I'm crazy about, but I admit I haven't exactly tried too hard yet.
