Good news!
 
Now, you can get on with making music. The Quad-capture and Octa-capture usually have good reports. It unfortunate your unit was, perhaps, defective. How's the warranty for it? Maybe, you can get a replacement that works good.

Thomas - Yeah, I haven't recorded anything for over a month.  
I think my Quad Capture is about 2 years old, if not more.   So I'm pretty sure the warranty has expired.  
The Focusrite Scarlett 2i4 seems to be fine so far, so I'm happy with it.
 
Thanks!
Greg

OK
 
Cya around.

I've been using an 18i6 for about a year now and have been very pleased with the results.   Here's hoping you'll do the same!
 

Thanks, Thomas and Steve!
 
Greg

Just thought I would update this thread.  I believe I found the solution to my problem.   I went through 2 computers. At the beginning with each computer, everything sounded fine - until I deleted the Sonar picture cache.   
I now have a new computer and have not deleted the picture cache - and everything is fine.   
 
Greg

Did you setup your Quad capture correctly for guitar with Hi-Z (input 1 only) ON and phantom power OFF and did you configure the gain with autosense or manually?
With autosense you really shouldn't get distortion.