B15 is what I’m chasing. Yes, had the Broughton Fliptop for quite some time. I sold it after I bought the SGT after a bit of time with both. I wasn’t 100% sure whether to let it go; they are different. Even with the preamp of the SGT-DI set flat, when you engage the B15 SGT side, there’s quite a lot of high end roll-off.
The Flex feels closer to the sound of the Broughton Fliptop (though that’s from memory as I haven’t had it for a couple of weeks).
I’ve never played a real B15 so my perception of what sounds most authentic is only coming from YouTube comparison videos. The SGT sounded damn close in this one:
It’s at the end of the video.