I use a pair of Ortofon T-5 mini transformers which bump my preamps 40db up to 66db which is perfect for the 0.26mV output of the Dynavector Karat 17D2 Mk2. You can find a gain calculator on KAB's site http://www.kabusa.com/ on the home page choose Phono Preamps from the yelow buttons at the top, once there select Gain Computer from the list on the right. Kevin has posted a lot of information on his site and is a great resource. Enjoy
Phono Preamp Vs. Transformer for Moving Coil
I have a Koetsu Black and am currently using a Creek OBH9. Loaded at 1000 ohms. The Creek is not adjustable and I believe that optimal loading is 100 ohms for the koetsu. I am getting good sound but in discussions with other members in the forum believe I am losing out on some quality. I have a Conrad Johnson PV11 that has a great phono stage. Is it better to go for an external phono preamp or Transformer and plug into my phono stage? I hear differing opinions.