Bring along some of your worst CDs to play: the harshest, brightest, most sibilant, steeley, and congested CDs in your collection. You might find that the CDs were not the problem, that your speakers simply were not coping with them well. The first track on "Clair Marlo: Let It Go" Sheffield Lab #CD-29 comes to mind. This track causes ear bleed on most systems. but plays back perfectly and amazingly musically on a T7 and Fet Valve system driving the Biros. Note that the remaster of this onto a different brand CD is pretty awful.
It would be nice to have the L/1s 2-3 feet from the closest wall, that the wall behind them was as non-reflective as possible, and that then were on wood (or shot, sand or kitty liter filled metal stands) putting the tweeters about at seated ear level. Yes, they will sound better with the grill clothes off (and don't look too shabby that way either). The L/1s are available in natural oak (samples supplied) or black oak.
For your information, the Biro Kensington subwoofer add a seamless, high definition (Q = 0.5) bass response down to shake the room level. When used with the subwoofer, the L/1 ports are plugged to change the low frequency slope to match the subwoofer. The Kensington can be driven from either line level (preferred) or speaker level. It has variable crossover frequency and level controls, a phase invert switch, and a crossover bypass switch to be used directly out of a surround sound processor.
Thanks for your interest. Frank Van Alstine