Hello - I have owned both the Soliloquy 5.3 and 6.3.
Their build quality is 2nd to none. Beautiful furniture quality cabinets made in North Carolina with very heavy internal bracing. They are rear ported, so you need to have them at least 3 feet from the back wall. They both sound great with both acoustic and electric musical sources.
The 5.3's even with their smaller woofers have good bass extension, but the 6.3's have even better bass and I think a more distinct mid-range, a larger room filling presentation. I have heard many speakers, some of them many times the price that did not sound as good. You can't go wrong with either one.
I hope this helps.
mescabo
Their build quality is 2nd to none. Beautiful furniture quality cabinets made in North Carolina with very heavy internal bracing. They are rear ported, so you need to have them at least 3 feet from the back wall. They both sound great with both acoustic and electric musical sources.
The 5.3's even with their smaller woofers have good bass extension, but the 6.3's have even better bass and I think a more distinct mid-range, a larger room filling presentation. I have heard many speakers, some of them many times the price that did not sound as good. You can't go wrong with either one.
I hope this helps.
mescabo