For the most part most companies even ineed the $10k range use average parts at best. I have been into molding for years.years .
Buy aftermarket capacitors, resistors, high speed diodes upgrading power supplies on adding chokes and bypass caps to the power supplies
Can and will transform a amplifier. A Vacuum tube amplifier- integrated
Vacuum tube amp is much simpler in design are easy to improve.
I bought a Quiet gem of a integrated amp
In the Jolida Aluminum body 3502 it weighs over 50 lbs very power German Iron
In thd transformers, it uses custom poly capacitors in the circuit for coupling
One of my favorites the Rike S-2 coupling capacitors mainly hand made in Germany ,the old S model not even close then the 2 version all natural oil paper foil Great dynamics and naturalness better then my Mundorf silver gold oil caps .
Naked Vishay resistors silver copper wire all included retail $2,300
Sold out now. Molding a amp is great. Donot forget Upgrading Vacuum tubes
NOS tubes especially the small ones vibration control Herbiespecially vibration
Control feet ,tube dampers. Hifi tuning fuses and a very high quality Power cord
And plug into only a line conditioner that does not have too Many other products
In the chain .non current limiting and a dedicated 20 amp line and do buy a good aftermarket Copper gold plated receptacle outlet good ones around $100.
Everything does count, and clean every contact from rca to speakers cables and
Terminals many people are lazy. At least 2x a year ?I use 99% pure alcohol
With good quality swabs just moist until swabs come up clean you will hear
The difference.