The Hurst 600 rpm motor that VPI now sells as a replacement for the HW-19 is the SP-3923 and not the 600 rpm 3203-001. The SP-3923 is special ordered by VPI, which Hurst does not sell direct to the public. You can only buy it from VPI. I believe it's the same 600 rpm motor that is used in the Classic. My HW-19 came with a 3203-001 and it was very loud. I could hear motor hum in the audio signal. I bought the SP-3923 direct from VPI and it is MUCH more quiet. I built a custom SAMA and now the motor noise can't even be heard on the HW-19 plinth with a stethoscope.
IMHO it's worth every penny to buy the right motor from VPI.
-Robert (not affiliated with VPI whatsoever, just passing on the info)
IMHO it's worth every penny to buy the right motor from VPI.
-Robert (not affiliated with VPI whatsoever, just passing on the info)