Bent Audio Autoformer vs Tube Pre


Has anyone compared the two? I'm thinking of building a fully balanced Bent Autoformer unit.

If you have compared the two, what do you think?
128x128jtwrace
Grannyring,
To be fair this topic has no universal 'right' answer as it depends on numerous varibles. For me however, a top quality active tube linestage is more satisfying and realistic of instruments and voice based on what I hear in live venues.Oh by the way, YMMV.
Regards,
What amplifier and source(s) do you plan to use with the Bent? I have tried many passive preamps and currently still use them in my system. One is balanced and the others single ended. From my experience I will say that with the right set up a passive preamp will help you achieve outstanding sound for little investment. Typically an autoformer or transformer volume control will be easier to match up with system components, but that shouldn't rule out potentiometers or resistor passive designs. In fact, a real sleeper is Roger Modjeski's pot in the box that uses a simple but high quality Noble potentiometer to attenuate the signal. LDR attenuators are also very good if built properly.