I've actually made a few active setups with super tweeters sounding great as well, almost replicating silk domes. You just need to high pass cross super tweeters at anywhere from 10khz to 12.5khz at -12 to -18 db slopes and viola they sound like silk domes afterwards. Smooth, no harshness, moderately airy with decent output. Mids will be low passed at 4khz and under as well. there will need be a big crossover gap between 4khz and 10khz because super tweeters are just overly peaky in that range, even with a steep high pass crossover in place, they will fully play into that range easily with a lot of output.
When you do a properly tuned setup, its loud but with no distortion and making it sound very pleasing to the ears, its no where near any point where your ears will give up. Actually its very dangerous because you dont even know that its waay too loud for you right now due to how smooth it sounds. You wont realize clean output until you try to talk over it or when you feel your ears ringing afterwards because when you are listening to it, you dont percieve it as loud because its not harsh or peaky. When its loud and buttery smooth, its a completely different experience than those PA concert speakers that are usually garbage tuned and peaky.
An SPL vehicle with a proper tune can double as a halfway decent SQ car when done right.
There's vehicles where they just want loud as balls with zero to minimal tuning where you walk close to it and you say fk that i'm not getting in there yuck, my ears are arleady hurting walking past this car. Then there's the well done cars where you go inside, for a demo and you dont want to leave and their sub setup is louder than the other guy's screecher car.
