The EC3 is a deluxe production version of the classic Ampex 351 amplifier circuit with added features. 12AX7 and 12AU7 tubes, Jensen input and Cinemag output transformers, 70dB of gain, a KILLER DI input, DC coupled push/pull output stage, the absolute finest Mil-Spec resistors and boutique capacitors, and a host of features make this unit a must have for the modern recordist. Loads of attitude and tube coloration without apology.