Fantastic results! I've been watching this and the ASR streamer projects from the beginning and anxiously awaiting the outcome. This is only going to get better as users start adding their own twists. I plan on conceptualizing and building something like this with fusion amps.
Congratulations...
I listen exclusively to metal, I have tons of stuff that sounds excellant. I get the majority of my new (to me) music from bandcamp.com , they have many download formats including mp3, flac etc. Stuff I cant download, I'll purchase the CD and rip.
A few examples:
Deeds of Flesh
Archspire...
Nasa uses cable ties. They are made of ethylene-tetrafluoroethylene.
https://www.sciencealert.com/no-this-photo-of-curiosity-isn-t-fake-here-s-why-nasa-uses-cable-ties-on-their-rovers
I've also been looking for something very similar, DIY active speaker/monitor usable close to the wall. I have been watching Alexander from Heißmann-Acoustics. He states in the comments here https://heissmann-acoustics.de/en/dxt-mon-vs-neumann-kh-120a/ an upcoming DXT-MON with fusion plate amp...
I will highly recommend Meze 99 classics. I have certainly worn them for 8+ hours and the comfort for me is exceptional. I can only compare them to BD DT 990 80ohm, Focal Listen, Focal Elegia and ATH-M50s. Let me know if you'd like more info.
I also would like to share my positive exchange program experience with Apos. Mine was serial number 2007, let them know, replacement in the mail next day. Great service from a great company, I have used them several times before they're always excellent.
Man thats great work @doctorjuggles! Where do you procure most of your supplies? I have made a bunch of xlr interconnects, think I'll try my hand at headphone/iem cables. I love these kinds of hobbies.
JBL Studio 570 for $199
https://www.jbl.com/loudspeakers/STUDIO+570BK.html?utm_source=cj&utm_medium=affiliate&utm_campaign=4485850&utm_content=13565658&utm_kxconfid=unr5xf4yk&cjevent=ed2e8fab0d3411eb82f6017e0a1c0e0b