Thanks for the info. I had my finger on the order button to get the Audiocontrol LC 1 800 amp but just hesitant about the power draw. The AudioControl is supposed to be really efficient and has an LC2i built in so no need for a separate line level amp, an all in one amp. The unfortunate thing is the that while I love the HD1200/1 it is a little inefficient and will pull a lot of power, plus I will need to find a remote start for it because it needs more than a line level amp will provide. Also just being conservative to keep the power draw low as not to throw error codes. The Tesla audio system is relatively low power so you don’t need much bass volume before you overwhelm the other speakers.The RD500/1 is great and a huge upgrade to the VMD1 amp. On paper, there's only 180W delta (2ohm) between the two but the sound is way cleaner at loud volumes (I initially bought the kit from NVX then opted to replace the amp with the RD500/1). My main goal was to maximize the bass but not sacrificing any trunk space - wanted it to be as stealth as possible. Tbh, if you don't care about your system being incognito/stealth, i'd save the bones and reuse your already existing HD1200/1 (great amp btw - had it in my land cruiser). You can wire it at 4ohm, port the box, and be bumping 2-3x more bass than mine, but then again, i dont know what your objectives are, just adding my 2 cents.