Speed Box for turntable

I would not worry too much about putting an aftermarket power cord from the wall to the SDS. Its function is to condition/clean/filter/stablize...whatever you want to call it...the power it outputs to the motor.

Dlwask, your suggestion not to worry too much about an aftermarket power cord from the wall to the motor controller makes sense and is very sane advice. But in the spirit of full disclosure, I will offer that the choice of power cord *can* make a sonic difference in some systems. In my system with the higher level Walker Audio motor controller and the Walker Proscenium turntable, this is the case. It's nuts, but we can hear the difference. In this crazy hobby of ours, this is just another example of the truism: "everything makes a difference." Cheers.
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Rushton, point taken and noted. My technical side always looks to find the answer or reasoning behind things, only to be proven wrong with a listening test. I can't tell you how many times I am just left scratching my head in disbelief when something really should not improve sonic quality, but it somehow does. I've learned this too many times before and sometimes I still wrestle in keeping an open mind. Walker 'table, you lucky dog!

Totally agree with you about being left scratching my head in disbelief on many of these issues, Dlwask. That is one of the never-ending mysteries for me of this hobby. :-)

Yes, the Walker Proscenium tt is a treat. If you're ever in the Philadelphia area I'd enjoy having you over here to share some music. Same to other Audiogoners.
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I have an old VPI PLC (third one and I got it used) and it diffently makes a differernce. Not only that but they lower thje voltage automaticly which lowers motor vibrations and adds years to your motor. Only thing is a VPI SDS is $1000 and the Walker is $1600. Not exactly chump champ! I do plan to get the SDS someday....