Hello, this is my first post so please bear with me. I'm working on creating a template where I have a "crossover plugin" on my master. Here's my setup so far:
I have one stereo track where I've imported an unmastered stereo wav file. On this track I've added my own mastering effects. I've brought the threshold way down on a sonic maximizer so the track is pretty much sitting at 0 the whole time. I'm doing this more for the purposes of experimenting with this particular project. It doesn't sound very natural but it's what I need for my current purposes. Anyways, I've created two master buses, each going to a separate physical output. One is going to a sub and the other to mains. I have the track being sent to both of these master buses with no added gain so both of the master buses are sitting right at 0 as well. I've inserted the same EQ plugin on both of the master buses. One is simply a brickwall HPF at 100Hz and the other is a brickwall LPF at 100Hz. I can activate these two plugins without activating the actual filters and my signal stays the same (the plugins themselves seem fairly transparent). But when I activate the filters, the master bus with the HPF starts to clip. I haven't added any gain at all. Just tried to cut the lows right at 100Hz.
I'm totally stumped as to why this would happen. When I ask for help from other engineers the only response I get is "why don't you just get an external crossover?". The whole point of this project is to create a template that I can use as software crossover so that doesn't really help. Any ideas as to where this signal boost my be coming from? Could my left and right channels be phasing into each other somehow while still preserving my stereo spectrum? Any help would be much appreciated. Thanks!