4 pairs- Dunlavy I, II, IV, V.
V are for main soild state system
IV are for All tube system
II are used (or I should say hooked up- since they are rarely used) for surround channels.
I 's are there just in case
Another single I is used for center channel.
Does Mini Dennon system with bookshelf Mission speakers, Nakamichi micro system, Dennon Garage system and Yamaha with Cerwin Vega AT-15 count? ;-)