The B1 Buffer and F5 Build intergrated, questions

[AndrewT]

"loud enough" and the ability to drive the power amplifier to almost clipping are quite different requirements.
Restate your question with sufficient detail to allow a useful but concise response.

 

[Dane]

inductors perhaps part of the LCR filtering for the PSU ? just a guess ....

The build thread is on AudioKarma.org

Yeah, those are Box Enclosure anodized alu boxes - like $12 a piece, inside one is AMB Labs The ε24 Power Switch Driver Circuit with small trannie and PSU, and inside another one is SCHAFFNER Multistage EMI filter