Well… For the type of preamp it is it sounds really good. It has a color in 450 hz that I do not like and a lack of control in the 160-200 range (T-Series). I feel the same about the DigiCo.
This is compared to preamps in the 1000 dollar pr channel range without ADC. I´m not sure if it is a surprise that other preamps that costs more money, generates more heat, adds a lot more weight also sounds better.
In the days before digi consoles I toured with Avalon 737 for my lead vocals. I guess I am relearning what I already knew 
