That's funny since those are not US caps. The only company in the US who makes most of the components that would be in this amp is National Semiconductor and I guarantee you none of their parts are in this amp. They called a buildhouse, picked out a generic board and sink and had the BH engineers install components to meet their spec, and voila. Any of us can do it. You call up a company, tell them you want a 5K amp with .001% distortion at 4ohms that is stable to X ohms, draws X amount of current, etc. They build some protos, ship them to you, you test, agree or disagree, wait til they get everything right, pay them, and bam you have amps. You don't have to know a damn thing about amps, electronics or anything. All you need is money. It's pretty simple and has been done for quite some time, and some people have become quite popular doing this.