Yes The PHY-HP while expensive are at the top of the list for single driver speakers. Fostex that are in Cain & Cain are great speakers. Madisound is a good place to get drivers. I am building some speakers based on the Fostex F120A an amazing 5" speaker that has a flat feq response from 65hz to 20khs. Once I am done with them I am going to build some speakers based on the PHY drivers. - Have Fun
There are some good websites on Single Drivers like
http://fullrangedriver.com/
http://melhuish.org/audio/index.html
http://www.madisound.com/
http://www.diyaudio.com/
Mark
There are some good websites on Single Drivers like
http://fullrangedriver.com/
http://melhuish.org/audio/index.html
http://www.madisound.com/
http://www.diyaudio.com/
Mark