Always a lot of discussion about speed and speed control. I'm no expert and do not claim to be an authority here. I'm just not convinced that the differences in how these turntables sound is due largely to speed control. I believe that the majority of our hifi turntables have speed and speed control nailed down very well. The key is having the right tools to accurately dial in the correct speed, but our tt's have the motors and control circuits to hold speed as required. We have discussed this in other forums. Most tables are capable to hold speed within +/-0.05%. This is as good as the master reel to reel tapes that the records were made from.
I believe the majority of the sound differences can be attributed to both isolation of the record and stylus and the dampening or sinking of the vibrations generated by the stylus (internal born) as well as external vibrations (feed back from the speaker output). The platter must be acoustically black. ie. no response to the stylus vibrations can be allowed to be fed back to the cartridge. The platter bearing, tonearm bearing and tonearm mount must be acoustically black. Any reflections back to the cartridge is going to muddy the sound, smear images and reduce detail. Looking at pictures of the EMT turntable convinces me that its massive chassis, platter and bearing probably makes this tt incomparable among tt's to asorbing vibrations and eliminating reflections back to the cartridge.
I don't think drive type matters that much either as long as vibrations are isolated and absorbed. Some of the advatages of rim drive might simply be the rim pulley sinking vibrations from the platter. Belts have their own way of isolating vibrations. I think DD is the biggest challenge for isolation and sinking of vibrations. These are just opinions on my part and I would like Halcro and Thucan to weigh in with their much more vast experience.
I believe the majority of the sound differences can be attributed to both isolation of the record and stylus and the dampening or sinking of the vibrations generated by the stylus (internal born) as well as external vibrations (feed back from the speaker output). The platter must be acoustically black. ie. no response to the stylus vibrations can be allowed to be fed back to the cartridge. The platter bearing, tonearm bearing and tonearm mount must be acoustically black. Any reflections back to the cartridge is going to muddy the sound, smear images and reduce detail. Looking at pictures of the EMT turntable convinces me that its massive chassis, platter and bearing probably makes this tt incomparable among tt's to asorbing vibrations and eliminating reflections back to the cartridge.
I don't think drive type matters that much either as long as vibrations are isolated and absorbed. Some of the advatages of rim drive might simply be the rim pulley sinking vibrations from the platter. Belts have their own way of isolating vibrations. I think DD is the biggest challenge for isolation and sinking of vibrations. These are just opinions on my part and I would like Halcro and Thucan to weigh in with their much more vast experience.