Looks like if I want a decent frequency range (74Khz) with a total gain of 10k ish I need to cascade 6 1Mhz opamps. Not as bad as I thought!
Going to try a 4 cascade first for a 43Khz Bandwidth with 10,000 gain to see if I get close to the claimed values :).
Actually, sticking with 4 to keep costs down and these cheap transducers dont have a large bandwidth anyway!
