I use these on an Am pro P-bass V and an Am Elite J-bass V, both tuned ADGCF. I've used several different string types, brands and gauges on these basses, but there were always something lacking regarding tone. Suprisingly these stock strings deliver all the great tone and playability i could wish for. And at a fraction of the cost compared to many other strings. There's not even a problem switching between E standard and dropped tunings. There are still strings with longer life, hence the 4 star quality rating. But for the price point on these...so what. Highly recommended!