You have never done it, I can only assume. I have, with a B-15 using the Jamerson setting (bass full, treble half, volume cranked). Totally inaccurate depiction. To lose that sound in the house takes a very concentrated effort of sabotage.That comment made me smile.
Active electronics were developed for good reason. Prior to their existence, during the mid-60s players boosted treble (and consequently mids) with roundwound strings, full tone rollup and ever greater amplification. Like that Jamerson sound? It was fine in the studio with an engineer to tweak it but live it was almost always lost in the mix with double bass drums and louder and louder guitars. P-basses were the worst live. Some of those '60s recordings were muddy too. Using flatwound strings in a live mix mostly didn't work.
