I think I've mentioned this before, but I built my own linestage using S&B mk3 transformers from John. I tried wiring them up as autoformers, as mentioned on some forum. There was a very slight difference in sound but, in the end, it was more important for me to use balanced connections with higher gain. It would take 4 autoformers for balanced I/O.
The autoformer wiring did seem to have a bit more deep bass, all other being equal. I also have the ability to turn up the gain on my bass amp to account for that. My Genesis 350's are not lacking for dynamics and bass but would certainly reveal if there was an issue in the chain. Easily (and queezily) capable 0f 20Hz test tones.
Comparing the Slagle autoformer to the S&B would be a different story.
The autoformer wiring did seem to have a bit more deep bass, all other being equal. I also have the ability to turn up the gain on my bass amp to account for that. My Genesis 350's are not lacking for dynamics and bass but would certainly reveal if there was an issue in the chain. Easily (and queezily) capable 0f 20Hz test tones.
Comparing the Slagle autoformer to the S&B would be a different story.