No - it is not possible to have a 100%$ accurate speaker - nor is it desirable.
For example it is well known that the most accurate speaker alignment called transient perfect sounds too thin and that a slightly less accurate alignment sounds more real.
Remember the purpose of reproduction is to evoke the feeling this is real so you can suspend what is obvious - namely this is a Hi Fi system and not live. That requires tricking the brain and quite likely slight deviations from strict accuracy will help that.
Thanks
Bill
For example it is well known that the most accurate speaker alignment called transient perfect sounds too thin and that a slightly less accurate alignment sounds more real.
Remember the purpose of reproduction is to evoke the feeling this is real so you can suspend what is obvious - namely this is a Hi Fi system and not live. That requires tricking the brain and quite likely slight deviations from strict accuracy will help that.
Thanks
Bill