Most effective electronic calls for coyotes?

[Goshawk]

I've spent more money than needed over the years on tape and solid state calling systems. Some are better than others, but none have proven to be 100% realistic.  My best example is this. Right now, if I go hunting and my hawk catches a rabbit, the rabbit's squeals will call in every songbird, cat, dog, crow, raven, ect in hearing distance. I have to get there quickly, or my hawk might end up as coyote or eagle food.  It's the real thing. If I sneak into the woods with my latest wizbang calling unit, and play a dying rabbit, I may get a crow to come by, or a cautious coyote but the response will never be as dramatic as a real injured rabbit, or disbudding a goat kid.

What electronic calls have you found to elicit the best response from wildlife when you use it?   

[MADMAX]

I prefer wind calls
I have a foxpro but have called more predators using mouth calls
 

[BeerBugler]

This is silly, a ton of things can go wrong on a set up but it’s not the quality of today’s e callers (Shockwaves, X24’s ect). The really cheap ones do sound distorted on high volume, but other than that, they call critters in over and over. IF…you are in a area with predators, you enter the area correctly, you set up correctly, you play sounds that are appropriate and those predators haven’t been educated to those sounds and you don’t get winded and they don’t see you before you see them.

[birdshooter1189]

I've used a foxpro inferno for several years.  It has some sound distortion....especially at higher volumes, but it has called in quite a few coyotes.

This year I bought an icotec nightstalker and also acquired a Lucky Duck Revolt in a trade.  Both the nightstalker and the revolt have significantly more volume and crisper sound than my foxpro inferno.  I think the foxpro x24 is in the same class as the nightstalker and the revolt.

The Nighstalker is currently my primary call and I've called in several coyotes with it in the last 3 months.

[hunter399]

You can always up your game.
Use both hand call and E caller.
 You know ,throw some distress sounds with hand call.
Use your E call for coyote sounds.