By that time, he had mastered the turntables, the amps AND the speakers...so it was an awesome experience and very different from most other equipments on display.
I would always spend an inordinate amount of time at his booth, asking questions on this or that, and I realise today how much of these conversations have actually filtered down to my own designs.
I recommend you visit the most comprehensive website on his life achievements at http://www.svalander.se/charlin
I have borrowed the photo above from that site.
Charlin was also a great sound engineer and recorded a vast array of music. He had invented a special stereo microphone, called the "artificial head", which is basically an object shaped like a human head with two high quailty microphones installed where the ears should be.
This technique has been since improved and is still very much in use for boutique classical recordings.
I believe such a device is actually permanently suspended in the void of the Sydney Opera House and used for live recording by ABC Classic FM.
If anybody can confirm this information, I would be most grateful.
I have actually used a home made version of a "tete artificielle" hooked up to a portable tape recorder from Stellavox running at 38cm/s (You need to be very quick to exchange tapes in between movements...)