Line Condition /Pwr Protection on Mono Block amps?

I would stick with direct wall plugs and remove power cords from wall when your not using the system.This way you have protection and you can sleep at night!

I'd be interested to hear other's opinion on amps with the Hydra. I have my Pass Labs x600s plugged into a Hydra-8 with Elrod Statement cords all around. I found the dynamics and detail to be improved overall, so I kept them that way. The sound was maybe 1 db lower through the Hydra, but the soundstage was more accurate, detailed, and realistic. I can do some more comparisons in the future, but I'm wondering if the type of cord on the Hydra makes a difference. I've never had another 20 amp cord to try on the Hydra, so the Statement is all I know.

Rob

Big power amps have less delicate components in them, far more power supply capacitance, large transformers and other 'bulky' electronics that can tolerate and absorb power surges better then most other audiophile hardware. So - Yes - they are inherently less vulnerable.

That said, ANY unprotected, plugged-in AC electronic device could be taken out by a bad lightning hit or surge. So, you always take a bit of a chance by assuming that any built-in surge/lightning protection (which may be just a simple fuse or fusable link) will be able to handle the type of surges that you encounter in your area.

I guess the bottomline is - If you feel that the amps sound enough better without protection to justify exposing them to a bit of risk, then I say go for it. They are the least likely of your devices to be affected by surges.

As for disconnecting the amps when not in use, I highly recommend against that except when you know that a storm is heading your way or you will be away for an extended period, as the Pass X- and XA-series amps are known to need about 3 full days of powered-on settle-in time to sound their best. That was a revelation that other X-series owners told me when I had one, and was easily proven in my own system. My X-250 and X-3 amps sounded cold and gritty when I shut them off after short periods of use. But after about 3 days of use or powered-on idling, it sounded much more relaxed, liquid and smooth. This was a very reproduceable condition for me. Of course, you may have a different situation, so try it yourself.

Personally, I never turned my X-250 off or unplugged it again... no surges, no problems, better sound...
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There is some missing but relevant context in your question that may explain your results, and help eliminate the issues you are describing.

Were you running the Pass amps on their own dedicated line- by themselves- before switching them to running through Hydras that were also providing current for other electronics such as your TT/ CD player? If so, then your results will never be positive because you are adding current load for additional electronics comparing to single electronics current load when running direct. The direct vs. conditioner comparison should only be made running the amps direct vs. running through the Hydra-- with no other electronics plugged into the Hydra that the amps are on. Adding other electronics onto the same line will always skew/degrade results--not because of the Hydras, but because of the total current load on the circuit at your panel and the line that runs from it.

Do you have the same gauge and quality of power cable running from the Hydra to your wall as you do on the amps? There is no point to having heavy-gauge high quality power cables on your amps if you are then summing that current through a lesser quality, or small gauge power cable running to the wall. Keep in mind also, that you are going from two separate power cables to the wall for each mono, to a single power cable to the wall(with Hydra). The power cable you choose to feed power distributors-conditioners should be at least the equal of power cables upstream.

The previous poster made a good alternate suggestion, however, the Hydras do not impede current, and engineers from Pass have tested and approved of Hydras feeding Pass amps, so the problem is likely the result of system or electrical context. I would be happy to make a few suggestions if you would like to e-mail.

Regards,

Grant
Shunyata Research