I was going to install a decent analog type crossover but then started looking at the digital stuff. I want to be able to filter hpf and lpf for each channel as well as subsonic for the sub as I don't believe the Taramps have a subsonic filter on them. I'm looking at setting up my 4 channel to run 2 tweets off the front 2 channels and the two mids off the rear 2 channels and want to tune them individually. I do have a crossover function in my head unit but it only goes to 500hz or so max and that's too low for tweets. You guys have any incite?