Not exactly sure what your are describing. What is the product you are using? And thank you for the reply.\n\nIt's not a commercial product but my own design. Although the speaker system does not have a sub, as it does not require one, being truly full range. However the LFE signal is captured and used. The larger knob on my custom amp\/speaker controller changes the electronic crossover around to make the speakers work correctly without an LFE signal.\n\n\n\nSo this function is part of the total design system. I mainly use this switch for SACDs played via the multichannel inputs when the are 5 audio channels and no sub.\n\nSo I guess in your situation you would have to have some DIY and design skills to even incorporate an analog electronic crossover to do what you want.