I created a thread a while back describing how I fitted an ACG02, filter based pre-amp into Alan (Niceguyhomer's) Black cherry Spector Euro 5LX.
These are truly great basses with good ergonomics, necks and quality of construction. The Tone pump in combination with the active EMGs is very good at 'in yer face bass' imo but there are times Alan (and I) were looking for more subtlety and 'warmth'.
Having listened to Alan's several times now, both being played by Alan and others, I realise that my 4 was eventually going to get the same treatment, so:
They get easier every time (fitting is very straighforward). The ACG02 in mine is slightly different in that the volume and blend are board mounted and combined and there's an extra passive control for both pups.
So that's Vol/blend at the front, High pass filter/cut & boost at the top, Low pass filter/resonant peak at the bottom and the single knob at the rear (!) is the passive tone.
Alan was a little short of gold knobs (evidently most folk have better taste) so I've nicked some black ones from my Harlot til they arrive.
How does it sound? Just like I'd have hoped. Still all that Spector growl but with a whole lot more scope besides.
I think that's 5 of these I've fitted now
Peter