Interesting SD active Jazz PUPs with built in switches, any info out there?

[Beedster]

Just acquired a pair of these http://www.seymourduncan.com/forum/showthread.php?233372-Rare-Jazz-Bass-Seymour-Duncan-Pickups-what-are-they! also linked here http://www.seymourduncan.com/support/faq/frequently-asked/everything-else/i_have_the_old/

Any thoughts/experience?

Chris

[Thunderbird]

Quote from SD
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[b]Functions of switches on old-style "Active EQ" bass pickups[/b]
We stopped making the switch pickups ("Active EQ") in the mid-'90s. We replaced them with the Pro-Active? series.
The little rocker switches on the Active EQ pickups change the sound. Switch #1 shifts the coil resonance. On a Jazz Bass? neck pickup and a P Bass? pickup, the resonance moves downward from 22 KHz to 6.4 KHz. On a Jazz Bass bridge pickup, it move downwards from 17 KHz to 4.9 KHz. The effect is to give a more focused sound with a harder attack. Switch #2 gives a broad band bass boost of 4 dB for the Jazz Bass neck and P Bass pickups, and 5 dB for the Jazz Bass bridge. The switches can be a very effective tool for changing the tonal "character" of your instrument.
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[stevie]

The switches don't make a huge amount of difference, although it's audible. They are also extremely fiddly. The output on the P-bass one I had was extremely hot, although it didn't lack treble like most hot pickups. The batteries last for years.

[Beedster]

Thanks guys, they sound pretty good and whilst the switches are subtle, they're still quite effective. Bottom line for me however is that it's just another thing to go wrong so the PUPs will be coming off the bass in question PDQ

[Thunderbird]

They might be worth a few quid if you sell them there cant be many about