An audio component you just can't let go

 If we speak of electronic component, my akg k340 and my Sansui amplifier  of the alpha series are irreplaceable in term of S.Q. /price ratio ...

Plastic tubes of all sizes and diameters, cardboard one, straws, Shungite, quartz, low cost Schumann generators. Springs, wood, concrete slabs, bamboo plates, cork plates, sorbothane all materials i use in my acousticals,mechanicals and electrical embeddings controls experiments.

Cost : peanuts...

The gear choice is relative to your budget and matter less at the end than the way you implement it in your room.

Dont be a passive consumers learn acoustics basic .

Believe me i dont need to upgrade...