I switched to Enhanced version for Storm Front, after reading the posts last night, and it sounds a lot better to me! I was using the audio 4 setting and the sound was very quiet in my left earbud, I thought I was losing the sound in that earbud because of all the times the dogs had yanked it out of my ears
Now with Enhanced the sound is much more balanced.
I love the Whispersync for voice discounts, so glad they were pointed out on this thread. At first I thought they weren't available in Canada, but it just seems like the amazon.ca webpages aren't set up to display Whispersync information. I can look at the webpage on audible.com to find out if there is a whispersync option (it's a bit of a gamble if there's more than one Kindle version of the book) or I can log out of my Amazon account and visit the .com site.