I would insert the equalizer into the tape loop. Since the signal is so low in amplitude on the phono, any noise in the equalizer will have a large effect on signal/noise ratio. Also phono stage alters frequency response in a "reverse RIAA" curve so think that equalization at that stage will likely have a significant chance of degrading the sound balance. As far as adapters go, yes you can use adapters, or you can get cables made that go RCA-XLR and back again. Just make sure you verify the pin configuration on the EQ XLR; some units vary from so-called standard.
Balanced to RCA or Opposite
Being at the apex of my search jorney for a perfect sound I purchased today Behringer DEQ2496 Ultra Curve Pro equalizer.
They idea is to plug it between a turntable (Oracle) and integrated SS amplifier(Dk Design). I hope that by introducing it into my audio system I will be able to "soften" or "warm up" the sound. The problem is that the turntable and amplifier both use RCA input/output connectors. And my new to me Behringer equalizer only has XLR (aka Balanced)connectors. Should I use some XLR(Balanced) to RCA adapters...I wonder if there are some better options?
They idea is to plug it between a turntable (Oracle) and integrated SS amplifier(Dk Design). I hope that by introducing it into my audio system I will be able to "soften" or "warm up" the sound. The problem is that the turntable and amplifier both use RCA input/output connectors. And my new to me Behringer equalizer only has XLR (aka Balanced)connectors. Should I use some XLR(Balanced) to RCA adapters...I wonder if there are some better options?