@Ricardus I would rather have the 15 inch drivers. I'd add some ElectroVoice ST-350. There are plans on the Internet for TL computer designed cabinets which are excellent. I only wish I had bought an EV Patrician speaker system even if was only mono. Stereo was a space and money swallowing proposal for home audio systems, a small amplifier with medium range speaker was all that was really needed. Take a look at this page which has info on what I've just mentioned. https://audioxpress.com/article/remembering-the-electro-voice-t35-super-tweeter