Raven Blackhawk LE... am I going to be disappointed?

Do not change to KT150s without doing a bunch of research on this tube type. I thought, for my garage system , that the extra power of the KT120s was worth the slight loss of humanity. I have never used KT150s, but have heard a number of users as well as manufacturers that dont like this tube.

To sound their best, the KT150 tube needs to be utilized in an amplifier and circuit designed with higher plate voltage and hefty transformers. 

Sounds completely different in my current amps specifically designed and built to run KT150s properly. Gotta hear the difference to understand and appreciate it.  

They might sound good enough, but too much potential left on the table. 

This summed it up. 
It sounded really good and better than the belles aria.  It would push right up to the aria in output / dynamics.  Maybe 90%
I was really curious what 95+db speakers were like so I borrowed a pair of whatever klipsch’s... RF3’s?  He picked them up for $200... they mopped the floor with the salks and they are not even close to the same level as the Salks, so it was the sensitivity / synergy that was doing it for me.

I have some Double Impacts lined up!  Hopefully tomorrow.

Im currently using a single Velodyne HGS10.  May add a pair of DD10’s this week as well.

had a good time rolling tubes today.  Learned that I have some pretty nice tubes.  Some amperex from holland and japan.  Some raytheon black plates.  Another really awesome pair I forget right now.

anyways, the salks sounded good but like was mentioned, there was too much left on the table.  
I get Klipsch now with tubes.  I bet a nice pair of klipsch’s, a nice tube amp and a vinyl setup is pretty cool

95+dB is really the place to be. But I get flack for even saying 92. That to me is rock bottom. As I suspect you are now really beginning to understand why. Your Raven is an absolutely fantastic amp, but one rendered out of bounds and unsuitable simply by the shortsighted decision to buy inefficient speakers.

That one move dooms and limits you forevermore to a hundred watts, minimum. Even then it is almost impossible to get the kind of effortless speed and dynamics you are going to be hearing, in spades, with Double Impacts.

But think of it, that Raven/Tekton combination is only about $6k! Which if instead your speakers were a typical 89dB could easily be 3X the money and still not get there! Not in SPL, not in quality. The typical 89dB speaker requires nearly ten times the power to do what your 98dB DI will do. People really should do the math. 20 watts and 98dB speakers, or 200 watts and 88dB. Which do you suppose you can buy higher quality with $3k? 200 watts? Or 20?

Then with the money you save not having to buy hundreds of watts you buy Pods, Podiums, turntable- now you are in heaven!

Methinks something is wrong with your subwoofer. It works flawlessly in this review...
https://hometheaterhifi.com/volume_4_4/velodynehgs10.html

Unless I am misunderstanding, the sub out on the amp is a high pass xover just to remove the low frequencies from the main speaker. You would still control the volume of the sub with the control on the sub. You actually wouldn’t want that output to be variable.