This is a simple and effective great value bass preamp. I had it installed into my Tony Thompson Quadra ( Jazz style) bass. It comes into its own in live on stage use, nice punchy tone that cuts thru mix nicely particularly when bass fitted with steel roundwound strings, I previously had a couple of high-end alternatives that cost twice as much, one was noisey, one was faulty. This retrofit brought new life back to my favourite Jazz bass. Highly recommend. I have used very many active basses and this gives the best bang for buck in my opinion