Power cord to add ease and tame treble.

Its quite a game isn't it?
After many ic and pc problems and yes I have gone the Cardas,JPS Labs,Blue Circle ,Audience route.I do believe cables make more of a difference than components, by quite a large margin.
Try line conditioning and some of the smaller cable guys like
Audio Magic ,and really worth a try "Z-squared" ,personal review soon.Very complete sound with their gear.FWIW
Peter D.

Glai,
I would try a master pc for virtual dynamics. Install on the your Ayres and listen to your system transform to another level. Good listening!!

Like a few have mentioned... A power cord is not going to solve your problems.

Here's part of what I think your problem is...Your preamp is not a good match for your amp. I believe Stereophile reviewed your preamp and the most useful part of those reviews are the measurements. Take a look and I think you'll find that your Pass amp does not have the optimal input impedance to mate with the Hovland.

Also, you may find that your JMlabs are not the right choice for your taste and room. The BE tweeter is an impressive piece of technology, but sometimes great individual parts don't make a great whole - just like combining a bunch of "recommended" components doesn't always make a great system.

Thanks for your posts, guys. I mean it.

Mike in NC. No room treatment. Room has heavy curtains both side wall with couch & heavy rug on wood floor. I am happy with the midrange & base balance now. Room treatment has more effect on low midrange + base?

JMCgrogan. The ridge st. cable was no brighter than Au24, Kimber 3033, which are slightly warm. I really like this cable as it adds a lot of focus and front to back layering to the speakers. The diva be has silver-copper wiring so may have some synergy with silver speaker cables. ( Copper would do too if that is the logic.)

Bigkidz. Nice to hear from you. Its is a dedicated circuit that are shared with a few lights in living room which I turn off. Friend can bring a PS audio P300. Would give it a try.

Jond. Had cx-7 into pass x1 both xlr & rca. No sig. diff for me.

Tried the toe in & out. No fix there.

Guess i should try power conditioner or wolff pc or harmonix pc.

Bigkidz, may be i need an Audiologic MXL DAC.

Thanks guys

There will be no fix until you address power filtration...