Have limited time for audio these days (job, kids etc) and drive an old European car (Renault Clio Mk3) where I changed the headunit for a Pioneer DEH-S720 and running standard speakers - 5.25" mids in doors and 1" tweeters in dash firing up into the windscreen.
Thought it would be interesting to tune it and see what it can (or can't do). Using the Pioneer Smart Sync app for tuning.
All running active off the headunit with no rear door speakers running. Mids crossed at 80Hz, mids and tweeters crossed at 5kHz all with 12db slopes. I have turned the tweeter level down to try to balance the sound by ear. Still need to do TA.
Initial output here:
It does have a cap on the tweeters as they normally run off the front output from the headunit. I have spliced the wires and connected them to run active. Don't know what freq the cap could be crossing the tweeter at unless you can spot it on the graph!
Needs lots of playing with....