Here’s a look at the key features:
Denon DP-45F quartz-locked direct drive, Sony PS-X75 quartz-locked direct drive
Build dates (roughly – this affects reliability):
Denon 1985-90’s, Sony 1979-81; Denon 2 points, Sony 1 point
Price new in Australian dollars:
Denon $439 (1985), Sony $649 (1981); Denon 1, Sony 2
Wow and flutter:
Denon 0.02% WRMS, Sony 0.025%; Denon 2, Sony 1
Signal to noise ratio:
Denon -78dB weighted (DIN-B), Sony -78dB; Denon 2, Sony 2
Tonearm length (longer better, as lower tracking error):
Denon 220mm, Sony 230mm; Denon 1, Sony 2
Cartridge weights catered for (larger weight range wins):
Denon 4-9g (5g range), Sony 12-26g including headshell (14g range, or 7g range if extra counterweight missing, as they often are); Denon 1, Sony 2
Turntable weight (heavier better):
Denon 7kg, Sony 13kg; Denon 1, Sony 2
Adjustable speed with quartz lock switched off:
Denon no, Sony yes (±10%); Denon 1, Sony 2
Denon 11 points, Sony 14 points; Sony wins
The Sony is best, although it is an older model. The Denon was one of the lighter models (7kg) they produced with an electronically damped tonearm, and also didn’t have the swappable arm tubes that their best models had, and those two reasons are why I left it out of the list I gave in an earlier post. That doesn’t mean it’s not highly competent, just that it was a lower priced model in their range – sort of a midrange model. It was a late-80’s and 90’s turntable.
The Sony, on the other hand, was one of their second generation (1979 to early-80’s) Biotracer machines, and was one of their best turntables at that time, in fact, the top model in many export markets. At 13kg, it weighs almost twice as much as the DP-45F, which should give it a clear superiority in resistance to acoustic feedback and sound quality, and it will handle a much wider range of cartridge weights.
The Sony also uses Sony’s excellent SBMC anti-resonant compound for the base, which will be less resonant than the Denon’s wood base. It will cost more (as it did when new – about 50% more), and is a much more collectable machine. However, as it’s older and more complex, it may be less reliable (which I've taken into account in the scoring).