I was recently very fortunate to have a factory visit and I saw a few leftovers from TAG's extravogence that are probably only just starting to benefit the QA in Meridian's R&D and manufacturing processes.

I am no expert, but they certainly appear to have some sophisticated tools available in house that I am sure will benefit future and even current products.

The design of the HDMax 421 is possibly an example of this. A fairly ordinary product utilising sophisticated circuit board design.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).