When [miceuz] was asked by a friend to help with his first electronic project he eschewed the usual blinking LED project and taught him how to build something he actually needed: a phono preamp ...

Phono preamps don’t get much more basic than the ... The internal circuitry is designed to deliver fine-tuned playback that matches the RIAA equalization curve, and the VP29 delivers 42 decibels ...

and RIAA equalization is required to restore the original signal. Typically built into an audio or A/V receiver, phono preamps also come as external devices for units without phono inputs as well ...