Regarding the Beatsonic improvement, I chatted with them online the other day and I am skeptical of improvement. It’s not an “amplifier” that replaces the factory amp, it’s a line level amp that, if you’re familiar with AV processors and amps, probably increase line level voltage to the factory amp allowing it to be driven at full power. Example would be an AV processor delivering .5v to the amplifier and the amp needing 1-1.5v to be driven to full power. Increasing the voltage output from the processor will drive the amp to higher volumes, and that seems to be what I have read is happening. The Beatsonic piece isn’t driving the speaker, it’s more than likely just increasing the voltage to the factory amp. In the chat, they said it improves and clarifies the signal, whatever that means. So unless it has some DSP inside, I think it’s just increasing the line level voltage a bit. Just my .02 on it.