I have an Orange pcp212 closed back and replaced one of the V30s with a new Creamback H75 8ohm. The cab is 16 ohm and the other speaker is also 8ohm and they are wired in serial. The new H75 is noticeably louder than the V30. I just pulled the other V30 and popped the H75 in and the cables are clips. I checked and both speakers are moving and the connections look good. Is this just perception due to the difference in frequency in the two speakers? Are new speakers louder? Thanks for any advice. They sound great but the difference is driving me nuts and I want the full sound of the V30.