The only problem I have sometimes with this is the volume will not go to zero when it is all the way down. When the dial is at zero, the volume will sometimes still be barely audible and will not completely silence. While not a problem for me, I could see this being a problem for some. This unit was installed inside a pelican case hooked up to a Polk Audio 4-channel amp and an optima battery to make the loudest floating water-proof stereo ever. This allowed me to hook my iPod up directly to the amp without the voltage drop from the iPod's audio jack (which turns into a volume drop). Still a great product, it completed my project!

Sounds good. Great for radios with only one set of pre-amp outputs or no sub out.

My sub used to always cut out and sounds choppy at 75% power. After paired this unit up with my zed audio amp, I could now crank it up to 100%, it never cuts out and the sound is tighter and clearer than ever. Love this product it fixed all my issues with my system!!

Got this to work with my Ipad Install in my Jeep works great, so far its been about 6 months and works flawless. Had an issue with the fuse holder but it was my loose connection.

works great, better than a pure line driver since it can increase & decrease the volume relative to your head unit

i have put several of these in various cars and always have worked well......extremely easy installation and great function....great for bass scares