The name says it all, I have been trying to find a way to make a simple solution for those who have wanted to bias their beloved 5150s and 6505s but either don't want to pay an arm and a leg. If soldering is not your strong point, I can do the installation cheaper than just about any tech I am aware of, you just have to pay the extra shipping for your amp. Sorry no picture, no real need for a potentiometer and wiring harness with two color coded leads coming out of it that will just be put inside the amp. You can buy here We can let this thread be a source of reviews and general talk about biasing, I know the topic comes up every now and then and there usually tends to be a lot of confusion. Any questions, comments and accusations are more than welcome.