I have the nvx enclosure & sub but wanted more power. I went with the AudioControl LC1.800. It has the built in line level inputs LC2i. I got a warning right away once everything was plugged in. I used the speaker level turn on option (GTO). For people that are worried it doesn't harm the vehicle. At first, I would pop the trunk & turn off the (GTO) switch when leaving the vehicle, but now I just installed a rocker switch up front on the side of the center console. If i forget to turn it off, i will either get a warning in the morning, which i will do the reset (10min) super easy, or I get lucky & there is no warning. Its all randomn. It is a really easy install. If anyone needs help in the Seattle area just message me.