Im using this for a hi/low line converter for a factory stereo. Wayyy better than a cheap one with a step down process. One of my best recommended products for a factory system add on.

I added this because I was getting some whine in my car stereo. I had hooked up my premium audio system to my amp using high level inputs. when I added this line driver, it completely and I am not joking completely killed all the interference noise. Now it sounds very close to an aftermarket HU in terms of quality and hits like a champion which it did before.

If you want to get the most out of your amp. The signal going in is important to help your amp seem to produce more power out. This product well help you produce and maintain proper input voltage. You will see a crazy increase in sound because of this. Your amp isn't producing more power but it seems so because of proper input voltage. Couple that with extremely easy installation and I highly recommend this product. It is as advertised!!!

This product says what it does and then some. System sounded a lot cleaner. It was simple to install, real self explanatory. I would purchase RF-BLD again.

this is the unit if you want to keep your head unit. I hooked it up in my Tacoma made the necessary gain adjustments and my systems sounds great