Complementary power conditioner for recent Hydra ?

I've used Furman balanced power conditioners on dedicated lines with Hydra 2 and 8 plugged into them.

No problems with compatibility.
No sparks flew, no noise issues, but...

I felt the sound was a bit restricted,or over protected.

So the furmans are run in the HT system and the Hydras are on their own in the music system.

Perhaps it was too much of a good thing,or certain wavelengths or frequencies were over filtered and others not.
At first I liked it,then I started switching components in and out of the devices as a system and on their own into just one device at a time.
I heard more clarity this way, but perhaps I am mistaking some of the "air" I hear for line noise that is present now.

Other than the Furmans(IT 15, It 2200)I haven't used any other balanced power conditioners or isolation transformers so my experience is limited.

I never had a chance to compare either of the Furmans directly with an EQuitech,that would be fun.

Inside the Furman is a very large transformer,and the larger one works best on a 20 amp line,so I never thought it wise to plug it into either of the Hydras.Something just doesn't sit well with me going that way, so I never tried it,perhaps I should as I've lived on the edge bypassing fuses for years.

Somethingelse that stops me from going that route is the thought that what the Hydra does to clean up the power maybe all in vain once it passes thru the Furman and becomes balanced.

So I figure, balance the power first and clean up the power that's just been balanced.

So far I've not heard from anyone who has gone the way you inquired about ,Elizabeth tends to feel it should be the other way around so you are not alone in your thinking.

I wish someone from Furman or Equitech or Shunyata could helps us with this dilema.

Regarding outlets,Shunyata already has cryod outlets that you can buy,I have a couple of them and they were better than any of the stock Hubbels I tried,but they were not cyod.They are the same outlets they used in their original Hydra series, maybe they use something different now.

I did spring for the Furutech GTX Gold, receptacle and I am quite impressed with the build quality,and the tight locking fit.
I run them on the dedicted line with my two power amps plugged directly into it.
I suggest you take a look at those before you take the plunge and buy at least one for your most power thirsty component,most likely your amp.They also come with the cryo treatment, and as I mentioned I've not seen a more robust receptacle,which is impressive compared to any stock receptacle.

How could it not sound better?

I would compare it to Cardas Clear and a stock one would be 18 guage zip wire.

I have plugged the Hydra into the Furman, but never the other way around.

I don't do that anymore,the Furman is in the HT system, the Hydra is into dedicated lines music only system.

I felt the sound was lacking speed when paired up.
So I would agree with what Grant states.

Also, simpler is usually better.