I'm very pro Kenwood, but Pioneer does make some very nice units. As of right now, kenwood is best in class with better grade audio components in thier radios, and the clear resistive anti glare screen with higher resolution is second to none. Go with thier excelon line if you can, they are amazing products.
As for the "tricking gadgets" pay attention to the reviews from the pros in the industry. Yes they work... Consistently... No, and they should ship with a lifetime supply of Tylenol... You will need it.
I'm 41... Life lesson learned the hard way... Just spend a bit more cash up front for the better product..... Or you will be spending more cash in the end for that exact same product eventually to solve your problems that you wouldn't have if you did it right the first time......
Trust me, I've learned that lesson more than once... Lol
That DMX9707S is a great head unit, I had, (age still have on the shelf) the older version but a step down... The 7704s. It was a solid unit, it may even get installed in my 19 classic until I can set aside some cash for a new excelon. Right now, still rocking the oem 8.4 and is ok... But as soon as the audio system is upgraded, I can see that 8.4 being replaced by a Kenwood Excelon
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