Also (and please correct me if I’m wrong, community), running the tweets on your four channel amp with the mids isn’t a bad thing. If you keep your gains equal between the two sets of channels, the tweets will stay matched with the mids as the volume knob turns. You definitely have more headroom than you need, but if what you have is a 4 channel, there’s no need (or advantage) to running a separate (smaller) amp for the tweeters. Just make sure they’re protected from a full-range signal with a fuse/cap/lamp/whatever in case you get a setting wrong in the DSP or a friend/child attempt to “fix” your tune.