I've been reading through a lot of the audio threads on this forum and a few car audio forums trying to figure out the whole 2ohm vs 4 ohm speaker deal. Reason being, I just want to replace my stock head unit so I can have a few more options. I have the boom audio speakers already both front and back, but I do not have an amp. I will probably buy an amp later but for now just I just want a new head unit. I'm looking at installing the Alpine 149BT, will the 2ohm boom audio's burn out the amp in the head unit if I hook it up without an amp? Will it work as good as the HK head unit for now until I add an amp??