Jensen 10" Alnico 5 efficiency

[joebor1776]

Hi,

Does anyone know what the efficiency value is on an old 1957 10" Jensen Alnico speaker? I'm considering getting a Celestion G10m greenback to replace the stock Jensen that is in my Gibson GA-9 (to preserve the stock Jensen and also to hopefully get a fuller sound with more bottom end). I want to compare the efficiency value of the Celestion (which is 95db, I think) to the Jensen though, to make sure I'm not going to lose a ton of headroom.

Thanks,

J