I'm looking to add a center speaker between 2 widely spaced khorns.
I can make up a mixer box from the figure in Paul Klipsch's Dope from Hope http://assets.klipsch.com/files/Dope_740700_v14n4.pdf but need advice as to whether I can use any stereo amp with a stereo-mono switch or if something like the Sony TA-N55ES is needed. The Sony appears to have dedicated mono input on the back.
Any suggestions for readily available amps that would be suitable?