Hi,
I´m by no means an expert, I´m just a hobby recordist

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I have never really worried to much about preamps and don´t think there is a holy grail of preamps and I think that a lot of novice recordists, like myself, think that buying a preamp will all of a sudden make there recordings better.
For me once I have decided that a preamp is good I don´t worry about it anymore and just concentrate on making good recordings through good and creative mike placement, correct tuning (guitar, bass, drums), getting the best performance out of musicians etc...
The samples for me just prove that the preamp works and sounds good and for the price is a good buy.
By the way the output transformer upgrade is very easy to do, I am no technician, my experience in soldering is making my own cables and multicores and I was able to perform this upgrade easily, soon I will order the Input transformers and do the upgrade also.
Coin at Audio Maintenance provides a great service and is the man to get the transformers from