I use Sonar Platinum and am having a mixing problem when I set up a mix all the bottom end and bass sounds great but as soon as I save audio mix bass is reduced about 15-20 db. Not sure what it is, do not have this problem with N-Track and ProTools on same system!!! Any Ideas?
 

Hi, and welcome to this forum. It sounds to me like a routing issue. Are you using any automation? Which plugins are you using? The more info you give, the easier it will be to help. 
All the best.

Might be small room bass effect. You hear more bass because bass is re enforced in your mixing space. When you mix you add less bass because of this. Your final mix will be mixed with less bass.
 
Other systems might be adjusted to compensate.
 
 
 
 
 
 

Compression and reverb only effects added nothing to the stereo out. The Mix sounds great on speakers and headset but when you Export Audio and then play it back on same system bass is dead. Still working on the mix but it should mix down what I hear to the final product they should be the same!!!!!

What do you do when you export? Could you describe? It should sound the same after exporting, so I am sure it is just a settings issue.
All the best.

Make sure you are using the "What You Hear" preset when you export. It's the simplest way to export what you want.
 
Regards,
Dan