just got back from playing my lp with the cs slash pickups through my classic. wow, i absolutely love it. i liked the tone of the aph1's already but these just take that tone and make it more authentic/vintage sounding. there is quite a bit more harmonic content and top end, and it seems to have a little bit tighter bottom and a touch more mids. i really like the output of these because they're a little bit hotter than stock aph1's. i think it really nails a classic paf tone. the biggest improvement for me was the neck pickup. with the tighter bottom and a more open top end, the neck pickup just sang. the pickups still have that aph1 warmness to it but they just cut better. they are extremely rich sounding and complex sounding. thanks alot mj.