Digital Signal Processor.
I'm putting an ebay auction unless people want to private me offers. It increases bass insane as it becomes a bass control module. You can only set so far with maxing bass at the headunit and amp. This makes the subs go beyond what the amp is capable of and sounding clean as well. I have a new car so I can't use it anymore.
AudioControl LC2i Digital Signal Processor | eBay
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