crisotop said:I've also built your impedance converter and ribbon booster boxes (although I lose about 7-8dB of signal when using the ribbon booster. Have to have a look at the circuit at some time)
It definitely works as advertized (+10-12dB). I built a few of those, both in the revised version as in the article and in the original version PRR once presented here.
Did you check out my little DIY-DI-Box, too? The circuit is very, very simple, yet it works well. I built a phantom powered version for a friend, and he likes it much better than the DI input on his audio interface.