2UNES

Been a year already. The 10" sub and 500w were good but I had to move up, now Kicker L7 12" downfiring box and Skar EVL 12 running off D4S JP8 amp(.67 ohm load total!). The amp needs plenty of power to run but it rips! If you are planning a system read this: Should have ran 1/0 power wire instead of 4 gauge, will need to replace it sooner than later. Would like to figure out best way to do 2- 12" underseat subs to get rid of the big EVL 12 box but this current setup will be hard to beat given the small underseat volume. Even with a seat lift it will be limited. Also replaced door/dash speakers with Kenwood Excelon set, sounds cleaner but they need more power so next step is 4ch amp for them, thinking 100w x4 for all door speakers or bridged 200wx2 for fronts only. FWIW, the factory Bose 6x9 measured 2ohm, the Bose dash 3.6 ohm with a multimeter, the Kenwood stuff is about 3.9 on both. Some say that's not a true way to measure for a speaker resistance, but that's what I got just for a comparison.

Just did a sub addition to 2017 Sierra CC with Bose, pretty straightforward job. I considered the Kicker plug & play from GM but figured I'd rather be able to upgrade amp/sub in future instead. Ran 4g Stinger power wire from battery to rear wall, down passenger side (used the fender to door jamb route) Removed rear seats to access factory amp wires, tied into factory sub wires at amp with Kicker KISLOC2 (line out converter) From that to Kenwood 300w RMS x1 amp to an under seat Kicker CompC 10" box (rated for 300w rms). The KISLOC2 needs no power and has a built in remote turn-on wire for amp, that was convenient. The sound is greatly improved! the 10" sub & 300w is not an eyeball wiggler setup but it hits hard. Big improvement from stock. The amp was free from my son(but no bass knob dangit), the wire kit ($70), CompC 10" box ($150) and KISLOC2 ($30) ...so only $250 for the upgrade was a breeze. Next step: switch out to a Kicker L7 12" down firing box and 500w or so monoblock amp (with bass knob), then switch out factory door & dash speakers. I don't think there's a need to replace head unit or factory amp, but we'll see.