--- sm81
--- Shure SM81
--- d2
--- Audix D2
--- km184
--- Neumann SKM184
--- '4011'
--- Danish Pro Audio (DPA) 4011
--- sm57
--- Shure SM57LC
--- mkh20
--- Sennheiser MKH20
--- c414
--- AKG C-414XLS
--- beta56
--- Shure Beta 56A
--- md441
--- Sennheiser MD441 U
--- d6
--- Audix D6
--- '4003'
--- Danish Pro Audio (DPA) 4003
--- re20
--- Electro-Voice RE20
--- '737'
--- Avalon Design VT-737SP
--- hv3c
--- Millennia Media HV-3C
--- rnp
--- FMR Audio Really Nice Preamp RNP8380
--- hv3d
--- Millennia Media HV-3D