Total newbie question here about completing a system

I would skip the equalizer.  At some point, he may want to do that in the digital arena, but first explore room treatments.

What model Yamaha?  Lots of $$ can be spent on analog turntables, etc. which can produce xlnt digital sound instead, so be sure he is into the 'process' of buying vinyl, protecting it, and pulling each one out for a play.

A sand box is a great way to provide acoustic isolation for a turntable (and they all need that) - tho putting it in a room (closet?) sealed off from the listening room is even better...

The LS-2 pre- is the real high end item in the list...

he will need a phono stage to boost and correct the frequency response of the TT before the signal goes to the LS2 line stage. Phono cartridges do not output a strong enough signal to drive the line stage properly and there are also physical challenges inherent in record-making that required the audio signal to be modified before being transferred to vinyl. Those modifications have to be compensated for. Both of those things occur in a phono stage. Some pre-amps have a built-in phono stage, many modern ones do not. Those that do not are often called line stage pre-amps.  Those that do are often called full-function pre-amps.  The LS-2 is a Line Stage pre-amp.  Signals from a CD or SACD or the analog signalk from a computer source can go directly to any input on a line stage.  The signal from a TT needs to go to a phono stage first,  If you want to learn the technical details, google RIAA equalization or phono stage equalization.

Newkphoto ,  Skip the EQ great idea!

 " analog signal from a computer source "....  huh???

You would need to take the signal from the computer using a OPTICAL/TOSLINK  cable connected to a DAC which will have a set of analogue outputs that go to the line stage pre-amp.

Matt M