Quote Originally Posted by brettw View Post
Lack of power.
The Garmin si runs 10times it depth
I seriously doubt that power is the issue, IMO it's in the transducers design.

So you're Garmin will run in 400' of water? I don't have any water that deep here but mine has no problems in 50' of water. Something in your set up is off. We all accept the limitations of our units and celebrate their strengths, regardless of brand. Honestly, I really think your looking for something that is unrealistic .