This cabinet (pictured before cleaning/reloading the 15's/bedliner application) has all the low end, etc. I could ever want. I am considering removing the "air raid" horn, sealing the hole and replacing it with a HF driver(s) The current horn is not crossed over. It has two capacitors in line. I was thinking maybe 2 piezos would be cool. The horn works, but I'd like to sweeten the tone a little. I would like your suggestions.