As can be seen from RX-V2300 manual
http://www.yamaha.co.jp/english/product/av/pdfs/moreinfo/rxv2300.pdf
it has phono input (i.e in-built phono amplifier module) with input sensitivity (MM) 2.5 mV and impedance Phono 47 k-ohms.
So you can use MM cartridges or high output MC carts (which produce about 2.5 mV voltage). For MC carts with lower output voltage you would need external phono (pre)amplifier.
A.
http://www.yamaha.co.jp/english/product/av/pdfs/moreinfo/rxv2300.pdf
it has phono input (i.e in-built phono amplifier module) with input sensitivity (MM) 2.5 mV and impedance Phono 47 k-ohms.
So you can use MM cartridges or high output MC carts (which produce about 2.5 mV voltage). For MC carts with lower output voltage you would need external phono (pre)amplifier.
A.