Furman Reference IT 15i power conditioner

Lacee, that's why I DIYed my own balanced power unit years ago. I didn't like the parts selection and daisy-chain wiring of outlets in factory-manufactured units. I opted for Furutech and Oyaide outlets and connectors, OCC silver and copper wiring, etc.

Pardon me, but this thread has me conflicted — maybe you can help clarify?
If I buy the Furman SPR20i it appears I will receive:

• Stable Power AC Voltage Regulation Tech (20 Amps RMS)
  
• LiFT (Linear Noise Filtering Technology) — Spec’d nearly identical to the 20PFi
  
• SMP (Series Multi-Stage Protection), featuring
  
• EVS (Extreme Voltage Shutdown).
  

The only uniquely addition from the Elite 20PFi appears to be

• Discrete Symmetrical AC Filtering on 8 of 12 outlets
• (and it could be said x2 of the SPR20i benefits)

Do I have that correct?

If so, it seems to me (on a budget) I should buy only the SPR20i to get all the good stuff without the “flat” effects of the 20PFi.
Can anyone confirm the effect of the Discrete Symmetrical AC Filtering as described?

I presume we can all agree that filtering again what has already been filtered could improve matters with diminishing results.

Flatness from Discrete Symmetrical AC Filtering is another matter. One I would prefer to steer clear of everywhere!

Thanks,
Lan

Anyone using a REF20i ?

I have the Furman IT Reference 15i and Elite 15i. 1) Reference is much cleaner than Elite. It's worth the extra costs. 2) The symmetrically balanced outlets are much cleaner than the linearly filtered outlets. Sonically, the two types of outlets are different. I would say the symmetrically balanced outlets gives a flatter frequency response curve, hence flatness. Whether that is a good thing or not, it's a personal taste. I'd say there is a reason that the IT Reference 20i has eight symmetrically balanced outlets but the 15i has only two.

I wonder if anyone compared the 20i's symmetrical outlets and 15i's, as the 20i's symmetrical outlets are also linearly filtered but the 15i's are not.