^^ may mali ba sa sinabi ko?
it's probably because of the typo; it's ASN57, not 75..
anyway, just like the number suggests, they are voiced like 50's pickups (close enough). just the right brightness. quiet even when distorted. you might still hear very, very minimal hum though. but barely noticeable. depende na rin siguro sa amp/pedal.
kuya Jon Dela Cruz (Elegee) ordered three sets of it for his clients' axes. You might wanna ask him for a review.
just a warning: there is a hum-cancelling coil under the sensing coil, so check if your guitar's pickup cavities are deep enough to accommodate it. If not, you might need to bring it to a luthier para laliman yung routing.