How you will need to connect your turntable to your Audioengine speakers mostly depends on the kind of turntable you have. Many modern turntables, such as the Audio Technica AT-LP120 and Music Hall USB-1, have a built-in preamp and include a switch on the back for "line" or “phono”; in order to use this kind of turntable, just connect the output of your turntable to the Audioengine powered speakers and select "line". With turntables that do not have a preamp, you would need to add one in order to bring the instrument level signal of the turntable up to line level; there should also be a place on the external phono preamp to attach the ground wire from the turntable. In our experience, most older turntables don't have a preamp built into them.