One advantage of a separate phono-stage is that you can locate the turntable and its adjacent phono-preamp a significant distance from the amp. Phono signals are very low level and easily distorted by long cable runs.
You'll probably still need an integrated amp, though. Most phono-preamps and stand-alone amps do not include any volume or tone controls.
You'll probably still need an integrated amp, though. Most phono-preamps and stand-alone amps do not include any volume or tone controls.