Plate Reverb Upgraded

I made some big upgrades to the studio's analog plate reverb over the past couple days.  It sounded nice to begin with, but I recognized room for improvement with its sound after hearing some audio production in the movie, Black Panther, in which a plate reverb was used.  After the work I did this week I can say the reverb now sounds significantly more rich and detailed than before, as well as having a smoother overall tone.  It now also has a much lower noise floor.  What did I do to it?  I built better tube amplifiers for it. 

The driver amp I built for it is the 5th driver amp I built for this reverb.  Its very different from its predecessors (each one better than the one before).  This time I decided to go for clarity over warmth.  Its essentially a high fidelity power amp designed in the 1950's by Dynaco for music reproduction, which I built from scraps and spare parts using the original schematic.   This amp is 75% smaller in physical size than the previous driver amp, so I now have a bunch of free space in the rack for more gear!  The power output is roughly the same as the previous amp, but it has about half as much noise and offers a more detailed sound. 

Finally, I set out to build a new stereo output amplifier for the reverb.  This is the 3rd output amplifier I built for this reverb.  Same controls as its predecessor, but different tubes, a more Hi-Fi sound, and a much lower noise floor.  I was very surprised by the sound of this new design.  It's so richly smooth and detailed and has a velvety dark background.  Beautiful!  In contrast, the previous output amp was bright and not as detailed sounding... and now in retrospect, maybe it was even a touch gritty.
 
All in all the reverb sounds to my ears as being 50% better than before.  Is it on par with the dreamy reverb sound of the movie production?  I don't know yet, but I suspect its much closer now.