Got a ton of metal film resistors 12step rotary switches and stripboard pcbs.
I will try two alternative OPAMPs and/or build a DOA with the neumann schematic i posted earlier.
I still didnt decide on the condensators but iam close to it 🙂
Frequency wise i will use:
Whats definitely going to be in the box is a transformer balanced output, and a passive gain reduction after that to overdrive the transformer.
well and probably a passive induction based lowpass 🙂
What could be in the box if i use opamps is an R+L to M/S and vice versa matrix. Transformers are just too damn expensive. 150 bucks just the transformers to do one conversion. Also resistors have to be 0.1% matches as it directly affects crosstalk.
So opamp is the way to go this time ^^
It would probably make sense to add another eq after the conversion back to R+L stereo.