Having an amplifier installed only applies if you are in a house. If in an apartment it gets more complicated. Also if you don't own the house you will need written premission from the owner to have an amp installed as it requires drilling holes in the house. Sometimes it will be better to have the outlet rewired because the wire may be old RG-59. A tech can find out what is best for your system by useing a signal meter to test signal strength at different points in your system.
Hope this helps.
Sean
Hope this helps.
Sean