I would not assume the spks. are at fault. I own some Paradigm Phantoms which also have a metal dome tweeter. I own two small 50w amps (one is Mos-Fet, the other Bi-polar.) Depending on the music being played, I generally prefer the Bi-polar sound. So, add a small amp (your rec. has pre-amp outs) and I believe you will be amazed at the better quality of sound. (BTW, the amps I own, MOS-FET Rotel RB-951. Bi-polar, ADCOM 5002. Next, you haven't mentioned what interconnects and spk. wire you're using. This also has an influence on the sound. Finally, your source may be the culprit as well. I like the idea of adding an amp. That would be ideal for your 2-ch. stereo listening. Good Luck!