Does Shunyata Hydra sound best with just one unit

I think the 30A/130A current of the SA4e is probably the output current capacity of the amp, not the input from the wall.
If you can plug the Threshold into a regular wall outlet, it should work fine on the Hydra.
I plugged two Krell monoblocks into a Hydra 8 without any problems but I didn't like the sound.

I have a dedicated 20 amp circuit for my Mc-402. I am using a dedicated Hydra 2 for my amp. I also have another dedicated 20 amp circuit for my front end components that are plugged into a Hydra 6. I then have another dedicated circuit for my HDTV and Tivo that are plugged into a Richard Gray 400 Pro. I am very happy with this set up. I used to have a little AC line noice, but now everything is super quiet.....

Tvad -
Threshold SA/4e specs are clearly stated in print in both in the owners operation manual and service manual. Also even states in my original Threshold brochures.
"30 amps continuous and 130 amps peak".

The Threshold SA/4e power amplifier is Pure Class A and will drive any speaker out there. I've owned some pretty ineficient speakers like Apogee Divas, Sonus Faber Extremas, etc. in the past and the Threshold SA/4e easily drives them. In fact there is a Threshold SA/4e for sale. But personally does not look authentic. The SA/4e has gold accents with an oval cut out face plate for the model number. The person on Audiogon may have what you can call a chop-shop Threshold SA/4e. I emailed the seller and they are trying to contact the original owner.

Thank you Tvad and everyone who chimed in.
Audiogon is good education too.
Joe