I have a elantra and just put in the soundstream unit when this same error occurred. How did you get the firware update was it from the website? So there is a way around this error??? Yes this update was provided by soundstream! I have called them and got files from them. I have PDF Instruction att...

staro0989 wrote:This is great to have! Thanks. Where did you find the firmware update? Did you have to contact Soundstream?

Ya I had to call them!
And no problem man

I just purchased Soundstream S-821ACRD and while I was installing I got error message. "Booting CheckSum Error! please emergency upgrade.", So I found the upgrade files from soundstream, instructions are attached here as well. Its very simple. Just make sure it says at end lock your SD car...

This is what I want to do it for couple more items in my car, first my demon eyes on headlight. So I can use same wiring set up, but would you able to draw a diagram for 3 way switch. One way stays on regardless, middle off and second way it will come on with parking lights.

Here is mine

I think I saw you many times! Never imagined you would be on forum! Always saw your car at Middlesex mall in Plainfield !

Hello everyone! I usually follow our Facebook forum! But just decided to drop by here and introduce myself! Don't have any recent pics of my car! Dont have any major mods! Subs! Interior lighting! Double dash head unit, retrofitted headlighs with RGB demon eyes (colors changable using app via Blueto...