What i am wondering is, if the signal that is being amplified is a wave and the top of it is pushed by one tube. Then the bottom half is pulled by the second tube. Are certain frequencies in the top half (ie. higher frequencies).Then the bottom half the lower frequencies. My thinking then ,if that be the case . Could one use maybe a telefunkin for the push and somthing like a mullard for the pull tube. Please feel free to educate me if I am seeing this wrong or if you hage tried this and what kind of results you experienced.