The phono pre-amp does two things. First it applies equalization to the signal. All LPs are mastered with a special RIAA equalizatiion and the phono pre-amp applies a similar but opposite equalization to make the LP sound right. The other thing the pre-amp does is boost the level of the output of the cartridge to a voltage level that your amplifier can work with.
So, you buy a pre-amp to connect it to your Turntable and then you plug that into any "non-phono" input, such as an "AUX" input, on your amplifier. So, if the NAD 1020 has a phono stage then yes, you can use that for your phono pre-amp. Since the NAD is a "pre-amp" that means it's doing the boosting you need, and if it has a "phono" input then that means it's going to provide the RIAA equalization you need as well.
More expensive dedictated Phono-pre-amps are simply better at doing these two jobs in a dynamic yet quite way.
Paul Green
So, you buy a pre-amp to connect it to your Turntable and then you plug that into any "non-phono" input, such as an "AUX" input, on your amplifier. So, if the NAD 1020 has a phono stage then yes, you can use that for your phono pre-amp. Since the NAD is a "pre-amp" that means it's doing the boosting you need, and if it has a "phono" input then that means it's going to provide the RIAA equalization you need as well.
More expensive dedictated Phono-pre-amps are simply better at doing these two jobs in a dynamic yet quite way.
Paul Green