Here's what Seymour Duncan say about the Quarter Pound PJ Bass set:
Together these Quarter Pound bass pickups provide a sonically full voice with a hold on to your hats high-output punch. Each strike of the string provides a full low-end bite with plenty of sustain. They’ve provided their unique punch for bass players from Blink 182, Alien Ant Farm, Rise Against, Bad Religion and Smashing Pumpkins. Players who have a P-J bass will now be able to get the rich tone of the Quarter Pound pickups with our P-J 4-String Bass Set.
The Quarter Pound for Jazz Bass was designed to deliver hot output, great attack, and massive attitude. The quarter-inch diameter poles and intense coil winding deliver a full, even response, with great sustain and sonic richness. The magnets on the Quarter Pound P-bass pickup expand the magnetic field and extend the frequency ranges for a fat, full, punchy sound with tremendous mid-range presence and maximum output. Though often used for heavy rock tones, this pickup set offers amazing tonal versatility, making it a favorite across the board in live and studio settings.
These pickups shine in classic rock, hard rock, punk, grunge and metal applications. For more versatility you can add a 2 or 3 band tone circuit. Each pickup is hand built in Santa Barbara, California.