Before i got a system if i turned the bass all the way up through the HU my stock system would have a lot of bass (for stock) but the rest of music would be all muffled, distorted, and sound like **** when turned up really loud. I have a sub now but still the stock HU. i use a LOC. When i turn the bass all the way up through the radio now the sub gets way louder but the stock speakers bass also gets louder. Which muffles the rest of the sound and sounds like ****. Is there a way i can make it only turn the subwoofer bass up? lol if that made any sense.