The Ocean Audio 500 Mic Pre is designed by and built under the supervision of Malcolm Toft. This 500 series module features transformers on Input and Output, and is capable of 60db of gain. It features a separate Hi-Z DI input with gain control, switchable 48v phantom power, phase reverse, and a 30 to 300 Hz sweep hi-pass filter. Like the other Ocean Audio 500 series products, the Mic Pre is available in a standard version with a black faceplate, and a limited edition with a gray faceplate. The limited edition (only 100 produced) are signed by Malcolm Toft.