I am about to buy an used 410HE, USA made. When I go to check it out I want to make sure the speakers are original. So, I called Ampeg tech support and asked what speakers are put into the US Made 410HE's. The guy told me: "Should be Celestion, 100w, 30oz" I have searched TB high and low and see no evidence of this being true. Can any one confirm or deny this? Or just tell me what speaker I should be looking for in this cab? Thanks in advance!