At the suggestion of that true gentleman and formidable ocean sailor Bob Novy (thanks Bob!), I took the plunge and got FatBoys to install in the BigRedBass.
It was an amazingly simple install:
-Un-string.
-Take the back cover off.
-Unplug the AXYs. Snake the leads through the
choke.
-Remove the two screws you can see on each
pickup, lift the AXYs up, and ease the pickup
leads through the routs.
-Ease the FatBoy leads through the routs.
-Set the FatBoys in the pickup routs and
reinstall the two pickup screws you can see.
-Snake the leads back through the choke, and plug
them back in.
-Put the back cover back on.
-ReString. Tune. Test Drive!!
Totally solder-less operation. The REALLY wild thing is the pickups went exactly back where the AXYs had been as I never touched the pickup height screws, the two screws you can't see. And it took a LOT longer to remove/re-install the strings than the pickups. I'd say each pickup took all of 60 seconds to swap once the strings were out of the way and the back cover was off!
I was perfectly happy with the AXYs, but I decided I'd really like to hear the difference the FatBoys might make.
I'd never really considered the narrow or wide aperture pickup question, as I basically had no side-by-side experience. I understood the implications of a pickup 'seeing' more of the string, but had never been in a position to really experience it. Until now.
The FatBoys alongside the AXYs are a more full, meatier sound. They seem a bit louder. The AXYs sound more single coil-like, the FatBoys sound more humbucking-ish. Sort of like the difference between a Jazz pickup and a MusicMan pickup, in Bass terms. I never felt comfortable soloing the back pickup, and chalked up that thin-ness to being backed right up to the bridge. That's true, but the FatBoy at the bridge is a fuller sound, obviously from seeing more of the string going back towards the neck. The neck pickup was never a problem with the AXYs, but now it's more muscular with the FatBoy.
It will take a while to experiment with pickup heights and the exact blend on the mixer in the back pocket to find the best settings.
I do know it starts to get that pushy/strings too close to the pickups tone up past the 12th fret with the FatBoys in the AXYs unchanged height settings. This didn't happen with the AXYs.
And I hear them hitting the amp harder at the same settings than the AXYs; not a huge difference, but noticeable. The upper bass and low mid EQ is gonna have to change on the amp.
At wide open tone settings or with the QSwitch (Spoiler circuit) in, the treble seems a little more subdued, whereas the AXYs would cut my head off wide open, a little smoother. And of course, they are silent noise-wise, just like the AXYs.
So, more tone, bigger sound, a little more grind than AXYs, and idiot-proof installation (I'm the proof of that!) for a couple hundred bucks. Overall, the BigRedBass now sounds a little snarkier, a little more muscular and insistent, yet still inside the glow of that clear, ALEMBIC tone.
They're both wonderful pickups. Not a night and day difference, just subtle changes that really seem to suit me. This is really subjective, but we must have a decision:
Am I gonna keep them?
Anybody want some AXY4's?
J o e y