2. analog
  3. 1181854929

New Teres Direct Drive Motor Available as Option

Hi Folks:
It looks like Teres is now offering a direct drive motor as an option on their regualar tables. As a Teres 255 owner I'm contemplating the upgrade. Has anyone tried the new motor on there existing/old Teres, and does it seem like the upgrade is worth it? Here's a link to the new product:
http://www.teresaudio.com/verus-motor.html

Cheers,
John.
outlier
emailists
923 posts
 
Ketchup - Your post is most intriguing, and brings up an interesting point.

Are most lathes direct drive?
lewm
13,541 posts
 
Ketchup, One would need to know a lot more about how a cutting lathe works. Perhaps someone among us can enlighten the rest. But if your idea has any validity, then in effect "stylus drag" is a good thing. There seems to be a body of empirical evidence that this is not the case. I would guess that cutting lathes use powerful high torque motors that are securely connected to the lathe, so that heavily modulated passages are treated no differently from those that are less so. But I'm just guessing.
pauly
1,012 posts
 
Lewm, empirical research (i.e. observation) for something as subjective as audio presents a very weak argument. I think Ketchup brought up a very valid point.

If we are to assume that physics tells us a platter will decelerate due to stylus drag, we would be mistaken if we were ignore the fact that the same force acting on the cutting lathe will have the very same effect.

From my own experience I have a few LPs that when listening to I have always thought that the transients were a little bit too quick and sharp to be real. (I am sure everybody on the BB has a few LPs that). I always put that down to the sound engineering ‘tweaking’ the recording a little, but Ketchup’s postulation does go some ways to explain the phenomenon. Simply put, it is not inconceivable that the cutting lathes used to create those LP’s slowed down more on transients than what my current TT slows down.

Sadly, we do not have any numbers or hard data pertaining to the amount of stylus drag and the effect said stylus drag has on a platter.

Regards
Paul
jj2468
280 posts
 
Just curious. Isn't the common warp in albums causing more variation in pitch than the differences between direct drive and belt drive?

I have a Cardas sweep record with what appears to be an average warp and the pitch variations are very clear as the stylus travels faster over the warp.

Am I wrong that flattening the record should come before worrying about belt versus direct drive in terms of pitch control and prat?
ketchup
702 posts
 
I think it's important, Jj, but we do already have vacuum platters, reflex clamps, ring clamps, and concave platters to help with warps.
More to discover