Within the Sterophile site you can find comments suggesting that $150 play can sound quite good and that the $4000 player is a bit better. Other comments suggest that the UPD-1 is as good or better than vastly more expensive players. Cutting hairs was a description of comparing other highend gear. I'm preparing to buy the Conrad Johnson edition of the UPD-1, but I'm having doubts before I jump. Other than speakers, how much differences are there between this stuff. Diminishing returns may be much more than I expected. With that in mind I'll probably still jump at the upgraded UPD-1.

Opinions on tweaks I made
-Removed bottom cover
-Applied some Dynamat to the under side of the plinth, the suspension brackets and arm board. (2-3hz suspension rate seams OK with the added weight)
-Used WD-40 to get the bearing out of the spindle, cleaned it and use synthetic motor oil when I put it back
-I wrapped the arm a bit (electrical tape)

Systemdek appears to have made 2 different spindle shafts. one smoth and one with a spiral groove. I assume the groove makes sure oil is moved all arouind the shaft? I use the spiral grooved one.

Hello,

my pair of CDM1 - bought in 1998, seldom and always played with low levels - has a very weak treble response.
Testing with white noise shows a sharp frequency cut off below 8 kHz, whereas nominal cross-over is 3 kHz.

A German B&W-group manager told me the tweeters' ferrofluid might have become thick so the coils would not be able to swing easily enough.
He told me this would be the result of thermal overload due to too high amplifier output.

Hello,
I recently inherited a SPR51 (Bush Transistorised Record Players). I know next to nothing about the technology and was wondering if anyone could tell me perhaps approximately when it might have been manufactured? Or any other relevant information about the product?

Thankyou