sand amp is just a terms used by manufacturers and followers of jules verne hifi to deride a particularly amplification technology. funnily enough they fail to see the humour in the fact that there's significantly more sand in your typical valve than there is in your typical transistor.

never the less, the time step PSU is an absolute fucking rip and provides no proven measurable improvement to the function of the deck. Sure the voltage line is cleaner, but that has not been shown to improve the stability of the deck or the motor noise.

So what use is it?

Steven, when i heard your set-up it wasn't gracefully reducing dynamics like a race car driver slipping the clutch mid turn to gain more traction- it was just sounding shit, hard, compressed, and sat on with a biting treble