The 512c is a combination mic preamp and hi-z direct input module. Using the all discrete 2520 op-amp, the 512c provides the most sought after sound in the recording world. With the ease of a front panel XLR and 1/4" hi-z input, accessing this module is easy. The front panel includes a ultra silent polarity switch, a 48V phantom power switch, a 20 dB pad that effects both the XLR in and the 1/4" input, and a mic/hi- z switch. The addition of a continously variable gain control and a 7 led VU meter makes the 512c mic pre the one and only.