Answer to your queston nlitworld,
I'll SAY THIS, I"M SOLD ON THE BXI PANEL MOD, ABSOLUTELY LOVE THE RESULTS!
Not only do I like how it sounds, but it looks superior in appearance too. Which was not a priority what so ever.

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Another Addition as well, I also fabricated these radiused top grill frame inserts. I wanted radius edges, versus, the existing squared off edges at the top of the speaker cabinet ramp area. My theory here, was to provide a even smoother subtle transition of frequencies, exiting from the top of ramp of speaker cabinet. Again, the theory, is to reduce defraction off the squared off vertical upright surfaces, on the top perimeter of ramp area.
For critical listening, I remove all grills on top and front of speakers, then I'll insert the finished radiused frames, ontop of speaker ramp perimeter, for critical listening enjoyment. Do the top roundover frames improve sound? It's a subtle, and a cheap task to complete. Plus, it gives a cleaner appearance alongside the top of cabinet. I finished the radius frames with this rubberized black plasti-dip that I already had, in my storage cabinet.

My speakers are positoned into my listening room 3 feet from front wall.
(Radiused frame inserts shown unfinished in photo's.) 

INFO ABOVE IS FOR MY PERSONAL REFERENCE, REGARDING WIRING AND SETTINGS FOR OB SUBS.
https://www.audiocircle.com/index.php?topic=149708.0INFO BELOW IS MY TUBE RESOURCES:
TUBE RESOURCES: Replacement of audio tubes, to mininize listening down time, away from your Studio's, or any other set up for that matter.
Helpful information for those trying out tube amps for the first time, with locating, replacement tubes or tube rolling.
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Basic list of a resources for tubes. If anyone wishes to contribute your resource, for purchasing tubes, please feel free to contribute as well.
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https://www.thetubestore.com/-
https://www.nostubestore.com/-
https://tubedepot.com/-
https://upscaleaudio.com/collections/vacuum-tubes-
https://www.tctubes.com/-
http://www.mcshanedesign.net/-
https://www.audiotubes.com/-
https://www.vivatubes.com/-
https://vintagetubeservices.com/Additional resouce for me personally reference information:
http://glowinthedarkaudio.com/home.htmlOptional alternatives for NX-Studio's: https://www.audiocircle.com/index.php?topic=129161.0https://www.audiocircle.com/index.php?topic=176707.0Anyone that is interested in a good resource for audiophile stylus tip replacements this guy takes it to another level of performance. For example this brand new Denon DL-103R phone cartridge, he upgraded with a top of the line Boron Cantilever & Micro-Ridge (MicroLine) stylus. He sells it upgraded for $550. Now it will compete with any cartridge in the $5K range. Pretty significant change, for a $100 more upgrade.






Curious what he can do with your turntable cartridge performance, by upgrading the stylus? Give him a call, he works with upgrading many manufacturer phono cartridges.https://phonocartridgeretipping.com/services/How is this related to my NX-Studio's? The source will be delivered by a even better quality stylus / cartridge combination, benefitting my speakers ouput reproduction.
