Black Lion Audio B173 MK2 Classic British 1073 Style Mic Pre and DIDesigned for recording engineers who want an updated take on the classic '73 style unit, the Black Lion Audio B173 mkII is a single channel preamp with a warm, creamy, 1970s tone. It's suitable for recording vocals, keyboards, guitars, basses, and more. This preamp gives you a half rack package, with an XLR connection for microphones and a 1 4" jack for line level or Hi Z instruments. The output connection is handled by the 1 4" TRS output on the rear