If you look for a 15'' speaker for guitar or bass, this MIGHT be for you but has a pronounced (in my ears ugly) boost between 125-220 Hz (measurewd with beyma test mike and pro-software).
Used in a Fender Twin Reverb (with original 15'ä' speaker) and that sounded shait. But in an open cab with a DSL20 Marshalkl = hallaluja!Use to replace PA is not recommended due to low power handling.
But, for the price (that has unfortunately gone up = beter options maight suit you) it´s ok and as always, you get what you pay for, so I am happy :)