I’m using some Dayton Audio ND140-4 5-1/4" Aluminum Cone Midbass Drivers and some Tang Band 25-302SH 1" Neodymium Dome Tweeters in an active two way setup with a JL Audio W3V3-4 ported subwoofer with just 40 wpc to each mid woofer and roughly 25 wpc to each tweeter. The sub is getting 200 watts rms and everything is controlled from a JL Twk 88 DSP and the sound quality is phenomenal in my regular cab 14 F150 XL. Typically mid bass drivers made for a car door or infinite baffle situation have small magnets and a high QTS with a stiff suspension. Total cost for the mid bass and tweeter drivers was just $103.62. No way anyone would beat the sound quality of these drivers with a car audio specific set for that price. The guys at work who have heard them in my truck don’t believe it.
Using home audio drivers in a vehicle is nothing new and depending on what you are trying to achieve, they can be great for sound quality on a budget. When selecting mid bass drivers you need to pay attention to the ts parameters and power handling of the driver published by the manufacturers. Of course car audio specific drivers are better suited for car door use but you usually pay a whole lot more for those drivers if you want the best SQ such as JL, Focal, or Morel. It’s very easy to get high qaulity tweeters though for much less money than what manufacturers charge for ones that are labeled for car audio use. This is especially true in component sets where I’ve personally found those tweeters to be small form factor with a high fs and lacking in SQ.
Some of the underground brands though still have nice stuff. Jeff pointed out to me the CT2 tweeters, which I have in my garage ready to try in place of my Morel MTD-12 tweeters as I slowly upgrade my Mazda CX-5 sound system. I will be running this system active too using a JL TwK 88 DSP too. Also have the NVX version of the SB Acoustics mid bass drivers for it too that will take the place where I have Polk mid woofers now from an old component system I bought yers ago.