Down to five pairs in use in the house now.
Tannoy 8" dual concentrics with ST200 supertweeters in the main system downstairs.
EPI M150 (x3) plus EPI M70s (rears) in the downstairs HT system.
These downstairs systems also share a pair of subs, using an EPI 8" woofer and a 15" passive radiator, run by outboard amps. They're barely on, realistically, with the Tannoys- it's only to extend the bass range to a bit more below 30Hz, than the speakers do themselves.
Custom speakers I built 34 years ago, using Audio Concepts AC7 midwoofers and Vifa D25AG35 tweeters, in the TV system upstairs.
Some random Sony 3-way speakers (but with dome tweeters) on the test bench.
GTE/ Sylvania 105s (10" with dome mid and dome tweeter) in the garage system.