Did you want to upgrade the turntable anyway? I gather you're not happy with the one you have.
There are many outboard phono pre-amps on the market, some with USB. You don't *need* the USB as you already have the equipment to connect to the analog outputs of a phono pre-amp.
There are many outboard phono pre-amps on the market, some with USB. You don't *need* the USB as you already have the equipment to connect to the analog outputs of a phono pre-amp.