I ordered a new guitar and if I strum it, it sounds horrible. Also if I hold down any fret while strumming the strings whack against the frets. Any idea why?
You should probably go to a local guitar store and ask to have it set up.
if it has a whammy bar you need to put more springs in the back to hold it in place otherwise I'd say to hand it to the guitar tech at your local music store and get a full setup including intonation action adjustment.