Hey Everyone,
I'm posting this in this forum because it is specific to T1 trucks but the same principle can be applied to other years.
First of all I do consider myself an audiophile. Not so much in vehicle systems but I don't want to add up how much time and money I have spent over the last 30 or so years searching for the perfect, limitless, balanced sound in my home systems. If you would like to know what I run at home you can PM me.
Now on to the point. I had some free GM accessory money to use up so I decided to give the Kicker sub upgrade a try. It sounded "ok" and did make quite a bit of bass. I would seem to get it dialed in for one type of music and then it would sound muddy and bloated on a different type. It was also very heavy in the upper mid bass. In case anyone was wondering what the DIP switches do for SURE on the Kicker amp here you go. (I measured them) Switch 1,2 and 3 are gain. There are 4 settings from all 3 down to all 3 up. Switch 4 is the remote turn on selection. Switch 5 turns the crossover on or off. Switch 6 adjusts the slope of the crossover from 24db (on) to 12db (off). I firmly believe that the way Kicker ships these is the proper setting for our trucks. (1,4,5 and 6 up and 2 and 3 down)
One thing that really bothered me about the install of the Kicker sub is that they are pulling their input signal from the right front speaker only. Does the Bose system have a high pass roll off programmed into that channel? What about music that has bass dedicated to the left channel only? What happens when you start to overdrive that channel in the Bose amp?
Say what you will about Bose but one thing they do well is "tuning" a system in a vehicle so that it sounds good at all volume levels to the majority of people. Read that sentence again. This is all done with a LOT of eq, monitoring the amp channels for compression and clipping and attenuating certain frequency ranges at higher volume levels. The result is a system that plays loud and sounds "decent" for the majority of consumers while staying within the budget given to them by the auto manufacturer.
Enough rambling. After a bunch of digging I found the wires that run to the factory Bose sub. I tapped these for the input to the Kicker amp. To my ears it sounds 100 times better. Much more balanced at all volume levels and with all types of music. It is cleaner and hits harder with less overhang. It also plays bass from both channels now. I really have to recommend this to anyone that has the Kicker sub upgrade. Hit me up if you have questions.
-Eli