Alpine RUX-KNOB Remote Bass Level Control Knob for PDX-M12 and PDX-M6

Updated review-Ok, so as I mentioned, I have the alpine pdx-v9 5-channel amp installed in my truck. There were apparently some wiring issues with the truck, because I finally broke down and took it to a professional installation place and they were not only able to get my head unit dialed in, the subs fulling hitting, and backup cam working…but the bass knob actually works now. When you turn it all the way down, there is pretty much NO HIT from the subs. Turn it all the way up and you have unrestricted bass from the subs. Its really awesome for quickly adjusting the subs if they are being overdriven by a certain song. Some songs are just too heavy on the base, per my settings, so being able to quickly adjust a knob to get just the right amount of bass is awesome…that’s what I was hoping for when I initially bought the thing. I am now VERY happy with this bass knob.Prev review-I purchased this bass level control so that I could quickly adjust the subs on the fly without having to go into the settings menu in the head unit. Well, I got it all hooked up and I have to say that I am completely disappointed. It says that it offers 12db of control on the package, which I guess just isn’t enough control. Either that or I just got a bad one because I turn it all the way down, no change, turn it all the way up, no change. And this thing is supposed to be plug and play. I am sure I could do some testing to see if it’s working properly but I pulled the entire interior of the car to run the wires…and I don’t feel like taking it all back apart again to trouble shoot this little knob. I would say that you are better off saving the $30 because in my experience it isn’t worth it.