Not sure if this is best posted here or maybe in the tech forum. Anyway, I get that different classes of pickups (e.g., humbuckers vs single coil) and configurations (e.g., series vs parallel or neck vs bridge) make a big difference in the sound. But when I listen to videos that compare different pickups of the same class (like a stock strat p.u. vs a particular Seymour Duncan single coil replacement) I most often am hard pressed to hear any difference. To the extent that they are different, I am wondering if it is just about output and frequency characteristics. If that's the case, it seems as if these are things you could just as easily accomplish using the guitars volume and the guitar&s tone/EQ controls. Or am I wrong about this?