taming studio 100's

Modify the crossovers. This will make the most substantial improvement, greater than cable tweaks. There is much room for improvement on your crossover boards.

I have my sub set somewhere between 50 and 60Hz. The level is actually quite low as I don't care to be evicted at this time. I wouldn't set the sub any higher.

Lneilb,
Have you tried this with the 100's? I'd be interested to hear more about modding the crossovers.

Thanks for the posts.
I am currently using AQ Copperhead for amp to preamp. Using Phoenix Gold IC's to a Sony 555es SACD Player. Forgot to mention that I have big picture windows stretching all across the rear of the speakers that start after about 3ft of wall height. Medium curtains behind each speaker and sheer panels in the middle. Speakers are now about 30 inches out from rear windows and about a foot and a half from one sidewall. Other speaker does not have sidewall as it is open-dining room alcove. Speakers are now 8feet apart and the listening distance is now 13ft away.
It is beginning to sound better but still needs some tweaking.
Talked to Klaus from Odyssey. He thinks AQ' are a tad bright too.Thinking about Groneberg cables(odyssey) for this setup as Klaus from odyssey says they are very neutral-even a tad dark. should match well. I do get excellent prices for AQ stuff though.
Last thing, Subwoofer crossover starts at 50hz to 150hz so I have it set at about 75hz.

I modded a pair for a friend 2 years ago. Upgraded caps, inductors and resistors. Two weeks later, after burn-in, he was one happy camper. Cheap crossover parts can hold back an otherwise excellent design.

Thanks again for all the responses. Turns out that my dealer gave me the wrong bi-wire speaker cable. It was a high crossover for a two-way speaker. That is why I had very shrill treble and no bass. They sound really good right now and am finally happy with my purchase!