What class of power is this?
Hello 3rdworld, what do you mean exactly? These are H-class amplifiers with (some say) the best audiophile AD8065 op-amps as preamplifiers (not yet in the amplifiers depicted here).
Currently using the audiophile standard, OPA627 op-amps in the thodio amps.
So do you build each of the TDA amps or are you buying them from a supplier?
I designed them and I build them fully piece by piece by hand and check every connection multiple times to ensure maximum quality and durability.