Whats the best way to save money on parts?
Use only one buffer per channel, moderately-priced op-amps, and a cheap enclosure. If that doesn’t save enough money, leave out optional parts. Beyond that, be careful about choosing cheaper parts than the ones recommended in the documentation. If you can’t get the cost of the amp down far enough, it would probably be better to go with a different amp design that’s inherently less costly than to use inferior parts for this high-end amp. Consider the PIMETA, for instance, a simpler PPA-like amp.
