Marvin Palmer

opps, ment MC40's....hahaha

You can see that the front of these are not G-S. it does not have the second control for the VU meter. These are serial # 534 & 535. Probably most rare and pristine MC-30's in existence. Like i stated. I thought they were restored. It was buyer in Switzerland who told me that they were original. Then as i inspected wiring i found they were in fact factory and brand new never used. regards, Marvin

My understanding G-S were for hearing testing medical devices. Because the G-S units were for hearing testing I would think they were very linear amplifiers (no roll off). A seller in Michigan just sold a single G-S for $800.00, he posted the G-S schematics, there were quite a few changes to the standard MC40. One addition was a "VU metering" circuit for the hearing devices. I spoke to the gentlemen, i almost purchased it. But finding another matching G-S unit would be difficult. Mine were NOT G-S units. They were special order matched pair for someone. In mine the only electrical difference from standard MC40 was the 6db low end roll off. Mine had gray painted transformers, no tube cover screen, and no "McIntosh 40" on sides. All other labeling was standard MC40 (No G-S label ). regards, Marvin

HI Dave- I was waiting for MC40 Pic's. I thought you would attach them and email. I just was reading your thread and you wanted to phone txt? That is fine. My Phone is 1-671-687-0884. Standard state to state rates apply (whatever those are, I txt my mom in Michigan all the time, never noticed any phone charges). Best Regards, Marvin Palmer

Hi- I had 6 sets of mono blocks. All MC's (30's, 40's,60's,75's). Took years for me to collect, they were all excellent / mint. I am a electronic design engineer w/40 years exp. After my first wife cancer i spent my single evenings blueprinting the amps. I loved them all. Now i am re-married, we moved into a smaller home, they were stacked everywhere. And sadly sitting for months at a time unused. I decided to make my wife happy and get the extra amps to people to enjoy them the way they should be enjoyed. I decided to keep one set, but could not decide which. So i decided to let the market decide. I am afraid i under priced them because they all sold super fast. I was down to the MC30's and MC75's. The MC 30's you can listen too all day, just super nice sound. The MC75's had power that brought out the emotion in music. So i left both on eBay. They both sold on the same day!!! Major sadness on my part. I had a part of super rare factory special order (like G-S, but for some other special use). It appears the Factory had no gray transformers, they are in business to make money. So they appeared to pull black transformers off the shelf and painted them gray. I think it was late in 1960's. because who ever ordered them never put them into use. They were factory wired, only change was input which rolled off bass ~ 6DB. I guess they were suppose to be used for PA or bi-amp purpose. An engineer purchased them in Switzerland. He loves them. He has MC60's and told me he put those on the shelf. He tested freq response and it was flat -1 db from 10hz to nearly 100khz! Anyway, would you ship via USPS? And what is your best price? Best Regards, Marvin Palmer