More effecient speakers?

The AZ Adagio’s have a fairly flat impedance curve. Meaning it’s relatively amp friendly already - especially with your SS Hegel. Take your entire system into account when ’upgrading’. Have you optimized your cabling and power delivery? For cabling, I highly recommend Snake River Audio - with both neutral and warm-leaning offerings. Greatly improved macro & micro detail retrieval.  Give Jonny a call for his recommendation as to where to start. I think he offers a trial period. My Adagio Jrs. really opened up with two of his cables.  Piano recordings now sound close to a real piano.

Are these the Floor standers or stand mounts?

I heard the FS driven by EAR 100wpc tube amp. Although I wasn’t thrilled entirely with that presentation, due to some other aspects of the system but not the power, amp driving them, it proved to me as was just said, you can get by with a fairly decent number of amps. Tube or SS.

True too, before I would throw the baby out with the bath water, I’d look into a different amp.

Possibly too, a different power cord for the INT could be just the ticket to increase refinement and extension, if this has not already been done. It will only be a greater benefit if indeed you choose to investigate adding another amp later.

I would however, keep the power level at 60wpc and above..

Given your input for listening preffs, adding a more powerful amp will or should yield more clarity into the presentation, ala your desire to gain that via higher Eff speakers.

Usually, more power will better control speakers. As such they should perform better providing less distortion. Am not familiar with your INT specs.

You do have options besides wholesale changes.

Luck…

(((would enhance the sound? The AZ’s are rated 89db. Do I need more efficient speakers?))

The word enhance could that mean things
I’ll presume you want to be more entertained?

What if you asked the opposite question?
What if I and went down on efficiency?
Could we find more enhancement, more cohesiveness and be more entertained?
I would also take a look at trying the Matching Hegal Dac XLR out into your 160 XLR in nice improvment eexpected over oppo
Best,
JohnnyR

Hey - i think the overwhelming consensus here is to be happy with what I have - which I am. And you're right - it's a cheaper and more fulfilling state of being.

I guess I'm like many on this forum - eager to explore what else is out there.