I bought them to replace the standard pickups of a Sire P5. It was a great upgrade. The tone was warmer, and you could hear the difference from the first note. Even the drummer in my band understood that there was something better in the bass tone. Of course, I should mention that it was way too easy to install them. If you are looking for a new pickup to spend some time trying to install it, this is not the kit for you. It took me 5 minutes to replace the old pickups, with the most difficult part being unscrewing the pickguard. Totally recommend them