Spectral DMC 30SS& DMA 250, need advice

I'm sure you'll have great sound regardless; however the MIT really is like phoey dust "magic" with the 'ultrawide bandwidth" Spectral gear.
I use Spectral and am always very pleasantly at the unexpected benefits accruing from moving up the MIT power cable products (as well as the incredible benefits of their power conditioning/isolation products). I'd give them a try. MIT is a different class of "technical" product. If nothing else try the non-networked Oracle AC3 which provides excellent power transfer. Feel free to contact me.

Some clarification.
I received my Spectral ref gear with common OEM power cords, nothing special whatsoever.
The SCs-speaker cables- "are important" with at least "some" Spectral amps and Spectral advises so in their literature. That is why they sell custom SCs made for them by MIT.
Knome, it will boggle your mind to step up to at least Shotgun AC2 power cord for your SDR 4000S. The Z Cord ll is entirely inadaquate for that level player. I use Oracle.
Joe Abrams has been an excellent person to do business with and is exceptionally knowledgable about MIT products and their use with Spectral equipment.