Hmm...yes i think you're right.
You saying i need to check the output jack socket so that i;m getting summed output ? Just checking - my leccy talent is
somewhat lacking
They could be original speakers, but still could have been messed with.
According to the Eminence webby,
if the TE 10's were all 8 ohm, 4 can only be wired for 8 ohm or 2 ohm.
If they're 16 ohm, 4 can be wired for 16 ohm or 4 ohm
If they're 32 ohm, 4 can be wired for 8 ohm