Pete B Posted May 30, 2007 Report Share Posted May 30, 2007 I worked over 10 years ago with an analog engineer who hadpreviously worked at Advent in the early 1970s. We often hadlunch together where we chatted about what went on behindthe scenes.I ran into this friend coming out of the Grand Hyatt in NYCrecently when the HE 2007 show was going on. I have to saythat I was surprised to read on this forum that some believethat Andy Kotsatos designed all the Large Advents. The earlyLarge Advents have the writing on the back "Designed By HenryKloss" and I believe it. I posed this question to my friendwhen I ran into him, and this was his response in a later email,posted with his permission:================================================================="Regarding your Advent query - the way I remember it happening was that Henry Kloss had a noncompete clause when he left KLH that prevented him from peddling loudspeakers for some specified period of time. According to legend, he designed the Advent loudspeaker and filled a couple of trucks with the things. On the day that the noncompete clause expired, the trucks rolled out to the stores! It is entirely possible that these very first loudspeakers were entirely of Henry's design.""By the time I arrived at Advent R&D in the early 70's, I vaguely remember there being some brouha about the loudspeaker not sounding right. One of my first tasks was learning how to run the General Radio stripchart equipment, and I wound up running lots of loudspeaker and crossover curves. Bruce Gregory, the lead electrical design engineer, wound up redesigning the crossover and Andy did the voicing by tweaking the parameters. There was a lot of back-and-forth (and lots of curves) getting the thing right. They also made a design change to the tweeter, but I don't remember the details. If anyone has an early Advent Utility, most likely it is one of these revised units, since they were the ones that sold in volume.""Personnel involved with auditioning the Advent loudspeaker product line most likely were Andy, Bruce, Henry, Stan Pressman (head of marketing), and Joe Hull."=================================================================Comment: We have only identified 2 early versions of the Large Adventwhat I call the Rev1 16/16 uF, and the Rev2 16/8 uF, what I call Rev3 isthe New Advent. The Rev1 that I worked on was from 1972, and I have seena very early version without the metal mesh screen over the tweeter. Thisearlier version might also have the crossover that was "not sounding right".There is also the addition of bulb dye tothe tweeters to seal the sometimes porous paper cone. I have never seen a natural paper color Advent tweeter but they probably exist.The Rev1 and Rev2 versions are the ones that sold in large volumes. Quote Link to comment Share on other sites More sharing options...
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