My quest for a brighter tone continues...

the brightest bass pickups I've ever heard were q-tuners.

 

Sounds like a set of active EMG's are in your future...

 

Actually if you want really bright pickups, you may be able to simply rewire what you already have. If it's possible, rewire your humbuckers to parallel mode, then buffer them individually, before they are blended. Switching from series to parallel will raise the pickup's resonance by about an octave, and buffering them will make this resonant peak as tall as it can be. You want buffers with at least 1Meg input z.

 

I'm not 100% positive, but likely those pickups are passive with an active pre. Bypass everything. Send the pickups directly to the output jack. Maybe try a 3 way switch so you can send just the bridge pickup to the output jack with no tone controls whatsoever.

You said obnoxiously bright. That'll get you there.

 

I only really have much experience with the active EMG 35DCs on my Spector, but i would definitely classify it as a very bright, yet tameable, sound.

 

I was going to suggest what two fingers said. Start by taking the pickups straight to the jack, to see if that's enough to do the trick. If that fails, then parallel wiring is a great suggestion!