We need to know w lot more about your setup before a credible response can be crafted....
Main/other speakers?
Preamp/amp/other?
I personally set the mains to small & try shifting the crossover frequency up/down until I get a good blend. You can also play with the slope...
TNRabbit
RF-83 Mains, RT-12d Sub, RC-64 Center, RS-62 Surrounds, Sunfire Ultimate Receiver, Carver SD/A-360 CD Player, Sony DVP-NS775V DVD/SACD Player
2-channel system is Sunfire Theater Grand IV processor, Sunfire Signature Cinema Grand 400x7 amp, Carver Amazing Loudspeakers III, Sony multi-disc player, and Benchmark DAC-1 digital-to-analog converter