The Amp Garage

I don't actually need the massive gain of EF86, since I play mostly with clean tones. IME there are just some magical harmonics in the EF86 sound that is often missing with 12A_7 preamps.

In this video (starting from 7:30) they discuss that the 2023 version of Bad Cat Black Cat had one significant chance: the EF86 tube was replaced with 12AX7, but they tweaked the circuit that 12AX7 would still sound like EF86. Any ideas what did they do to achieve it? I have no idea if it actually d...