I am selling my Naim Prefix K phono stage for the Naim Aro tonearm (selling separately). I purchased this used from a Naim dealer but never installed it. This phono stage is designed to be installed inside the Linn Sondek LP12 turntable. It has a 560 ohm impedance and is suitable for low output moving coils. The Prefix needs to be powered from a separate power supply or some of Naim’s preamps. I am looking for $350 obo with free shipping within the continental US. Thanks for looking. PayPal please add 3% or send money as gift.