Sanken SAP15PO vs SAP15PY

[Masterpop]

Hi,

Would anyone be able to tell me the difference between:
Sanken SAP15PO and Sanken SAP15PY?

i mistakenly bought SAP15PO and then realised that my current amp has the PY variety inside it.

are they interchangable by any chance?

thanks very much for you time

 

[richie00boy]

A quick look on the datasheet tells you that suffix O has gain 5000-12000 and Y has gain 8000-20000.