Hello, I'm back and happy to report my first impressions on these Apollo pickups!
So I installed myself the pickups, the CTS pots B250k, B250k, A250K and the Mallory 150 series 630V 0.022uF 10% tolerance tone cap.
I plugged in to the only bass amp that I have so far, which is a old Laney solid state RB1 15 watt practice amp, which by the way sounds pretty good for a small practice amp.
Immediately I noticed one of the best improvements, which is the perfect even string volume separation. No longer do I have to have the pickups so low in order to try to get a decent sound and string volume separation. I think SD really nailed it with the magnet staggered and whatever they did when designing this pickup. Now I can have the pickups height as high as I want and dial in a great punchy tone without being boomy or muddy. The E and G string where the most problematic in this regard on the previous stock pickups. The G string had a lot of unwanted overtones or extra nasty vibrations and was very difficult to eq or control. Now with the Apollos there is no problem of that, perfect balance in my opinion and a breeze to eq. There is no ugly boomminess anymore.
These are not the loudest or hotter pickups but that is something that I like, because they have the vintage single coil sound in spades. Definition and articulation is out of this world, even though I am using Ernie Ball Cobalt flats which are a little darker than normal round wounds. On the Youtube videos they sounded kind of bright to me, but with my Cobalt flats they sound just perfect on the brightness department. I think they have the perfect amount of low end, which is punchy but not extra thick like maybe the Quarter Pounders. I think these pickups also have the right amount of mid range, a little scooped like others have reported, but perfect for my taste.
My bass now is 110% quiet as a mouse, no hum at all whatsoever. I am glad I did not fall into the pickup and control cavity shielding hype, because in my case is has been completely unnecessary, less work to do.
I am seriously impressed with how tall I can have my pickup height now (not to high of course), compared to other pickups. Maybe it's got to do with how extremely articulate these pickups are, that you can pretty much do whatever you want with them and not sound boomy or muddy and still retain impressive string volume balance and note separation.
I am just getting started with these magnificent pickups, I will report back when I try them in other amps and settings and maybe try to do a nice recording and share it with you all!
For now I don't know what else to say, except expressing my maximum respect for Seymour Duncan pickups for having conjured these wicked clear and balanced Jazz Bass side by side dual coil noiseless that sound like true vintage tones without the hum...