A friend of mine has recreated the legendary Lobue Custom Bass that Gene Simmons lost in 1977. This bass IS the classic Gene Simmons bass sound! Having played and listened to this bass it is more than likely that this is the bass (model) he recorded most of the classic Kiss albums with. This bass underwent many changes between 1973 and 1977, you can learn more about it on the excellent Axeology site:
https://axeology.com/GENEindex.html
Gene Simmons used Ampeg SVT stacks live. I got the closest using a a 1965 Fender Showman 1x15' Tone Ring Cab Rig.