1974 Big Muff, 1973 Marshall Super Lead, 1973 Celestion Greenbacks G12M25 75Hz in 1960A and 1960B cabs. Gibson Les Paul with either T-tops or Super Distortion pickup in the bridge.
Interview with Ace and Paul
http://www.lespaulforum.com/forum/showthread.php?159618-Kiss-Ace-and-Paul-1978-Guitar-mag-article-Good-LP-talk
G12M Vs G12H vs G12S
https://youtu.be/onc4q0TZD5A