So Iím sure some if not all of you have seen this for sale on Reverb and EBay, but I am the owner of this rare bird. Itís a Model 60 with a 4 channel passive line mixer added. Itís the prototype precursor to the coliseum pa. Originally designed for The Beach Boys as their 1st pro PA system. According to Mr. Sundholm this may very well be the one he built for The Beach Boys although after a ton of digging and research I have not been able to corroborate that. Just wondering if anyone might know how many of these were built and any other info that I have not been able to track down. Otherwise this is probably the biggest prize of my collection.

https://imgur.com/a/4TnCBI0