I had pretty good luck calling crows with my CD player/mini-amp/horn speaker setup. It got plenty loud enough. You might need a fresh 9V battery in your amplifier. Driving that big speaker will really eat up the little transistor batteries quick.

I never had much success with hand calls though. But, I've only tried crow hunting a few times so what do I know.


But now, this is what the LORD says-
he who created you, O Jacob,
he who formed you, O Israel:
"Fear not, for I have redeemed you;
I have summoned you by name; you are mine.

When you pass through the waters,
I will be with you;
and when you pass through the rivers,
they will not sweep over you.
When you walk through the fire,
you will not be burned;
the flames will not set you ablaze