As far as I know Micro never moved from direct drive to belt drive. They simultaniously offered a range of direct drives (DD-series) and belt drives (BL-series). That being said, they went much higher end with belt drives (RX- and SX-series) than they ever did with direct drives. This might suggest that they had stronger faith in the capabilities of belt drive.
There's one point in their 80's catalogue where direct drive and belt drive sort of converged. This is the 1500-series platform, which offered the DDX-1500 direct drive (their top direct drive model) as well as the RX-1500 belt drive, which was the entry level of the big Micro's. It could be upgraded to include all the features also found in the highest end models, including gunmetal plateaus, air bearing and vacuum disc stabilizer. It would be interesting to compare the DDX-1500 with the basic RX-1500 (with aluminum plateau and the motor drive attached to the unit), using the same armboard, tonearm and cartridge. This would be a fair 'shoot out' between direct drive and belt drive, all else being equal. Has anyone ever done this?
The designer of the top belt (or string) drive Micro's founded a new company called TechDas, modernising his old designs with current technology. This would suggest that belt drive is - and perhaps always was - his preferred technology. He's now on a 'world tour' with the ultimate AirForce Zero. This monstrosity makes the old top Micro SX-8000 II look like an entry level table......
There's one point in their 80's catalogue where direct drive and belt drive sort of converged. This is the 1500-series platform, which offered the DDX-1500 direct drive (their top direct drive model) as well as the RX-1500 belt drive, which was the entry level of the big Micro's. It could be upgraded to include all the features also found in the highest end models, including gunmetal plateaus, air bearing and vacuum disc stabilizer. It would be interesting to compare the DDX-1500 with the basic RX-1500 (with aluminum plateau and the motor drive attached to the unit), using the same armboard, tonearm and cartridge. This would be a fair 'shoot out' between direct drive and belt drive, all else being equal. Has anyone ever done this?
The designer of the top belt (or string) drive Micro's founded a new company called TechDas, modernising his old designs with current technology. This would suggest that belt drive is - and perhaps always was - his preferred technology. He's now on a 'world tour' with the ultimate AirForce Zero. This monstrosity makes the old top Micro SX-8000 II look like an entry level table......