Yes they did . <| sep |> That means the person you bought it from already redeemed it <| sep |> They recommend replacing the smallest disk with one that matches your largest because it ' ll give you the biggest increase in space . , but replacing your smallest drive with anything larger will give you more space . Is there a reason the 2 GB drive was just laying around ? You don ' t want to switch over to it just to have it fail . You won ' t be able to go back to the 1 GB later . <| sep |> How she has not been arrested , thrown in jail for life and placed into solitary confinement yet is beyond belief . <| sep |> Your question can ' t be answered as generically as you ' re asking it but you can say that compared to a sealed box , generally a port box will have increased response around the tuning frequency . You really need to use a speaker modeling program to see what the effect of changing the cabinet volume and tuning frequency is for your particular driver though . I also don ' t agree that you shouldn ' t try to reproduce lower frequencies , but you need to make sure your driversbox are capable of it . IE if you ' re trying to get flat response down to 40 hz with a single 8 driver , you ' ll be making sacrifices , and you might be better off just trying to get down to 70 hz or 80 hz instead , to be able to meet the other goals of the speaker overall SPL , power handling , etc .