The Doorspalace is located in the centre of Amsterdam.

Central Station:
When u arrive at the Central Station of AMsterdam it is a 10 minute walk from there.
-Exit the main entrance of the Central Station. You're standing on Central Station Square
-The main road ahead is the Damrak / Rokin
-The big road at your right over the canal is de  nieuwezijdsvoorburgwal.

When you walk in to this big road, stay on the right. After75 mtr take the road at your right and that's the Spuistraat . After 750 meters you will find it on your right hand