The Kenwood website is wrong...if you download the user manual for the -993 and -693, it has the true spec's.
Be thankful there's even that much info on the Kenwood site. In my quest for dual wheel head units, I of course went to Kenwood's site. It was so badly done, I wrote a nastygram to them. A day or three later, I get an e-mail thanking me for my feedback.
I figured it was just the standard blowoff....however, someone at Kenwood must either have been mad enough, or embarrassed enough, or maybe, both, that when I went there a couple days later, they actually started putting those sections in for each of their head units. If you look at the -X493 page, it even has a Specifications tab that the other two lack.
Sadly, they neither can manage to get the info correct, or still actually link to the F'ing manual on their manual tab. Using the Search on their manual tab brings up nothing, even though if you go to their Support section, the manual is plainly downloadable.
Their site before my nastygram: 2/10
Their site after my nastygram/now: 5/10
Chuck