Hello from Sofia, Bulgaria!
To be honest, I'm member from long, long time ago, 2008 y.
In last years Open Baffle speakers catch my attention. I think AC have a excellent Circle about this topic.
So, its time to write something.
My audio system consist from semi-DIY

components.
For example Luxman L-510 with custom attenuator, based on MUSES72320 chip and simple arduino board for control.
Managed to keep original power stage and RIAA preamp. IMHO, sound quality rise several levels.

My loudspeakers Caprihorn III are also DIY product form very experiences bulgarian constructor.
https://rutcho.com/speaker_projects/01_the_caprihorn/the_caprihorn.htmlAnyway, I'm not consider myself for very DIY guy or passionate audiophile.
I'm just curious about some engineering topics and love to listen and collect music.
Thank you for your attention!
Best Regards,
Kiril