I almost built something without extreme mission creep... Almost.
The idea was to build a quick pair of 612 cabinets for some 615B drivers (605 with different horn marketed as a ceiling mount). Everything was going smoothly until I remembered a schematic for a time aligned network specific to the 605... everything went off the rails from there. Needing cap <1% in odd values meant grouping caps to get values. That turned into potting the caps... Because the circuit is similar to the Urei networks I added the fuses for protection and the BNC connector for the conductor compensation circuit.
I eventually made it back to earth, and these sound fantastic.
eso