Pickups: IMHO sound really nice, (not changing mine - at least not yet) I actually believe that you get a law of diminishing returns on what you pay for pickups. But the good thing is that due to the standard soapbar size (110x35mm) you can cut your coat according to your cloth. The G4M website describes the pickups as 'active' I'm not totally sure that is the case, in fact I emailed them 6 months ago to say I didn't agree and the email I got back was they would amend the description, however it still remains in the description so perhaps they are active? the picture shows the original pickup wires. Hopefully you know your stuff as I'm still a newb and have little knowledge about pickups.
Pre-amp: If I didn't entirely strip down the guitar before the refinish I was fairly happy with the sound. That said once I've removed the electronics I plan to do a good shielding job on control, pickup and battery box cavities. Because the stock build was a rat's nest (whereas
@kodiakblair who has the Redsub says his was lovely and neat with cable ties) here's mine;
I've non-destructively removed the components rather than
@LowEndLobster 's approach to getting the sidecutters out (would have saved me loads of time but I was bought up with a mom who lived in wartime and even in the 60's and 70's I had to eat everything off my plate
) so I've squirreled them away for a rainy day. I've ordered the Glockenklang 3EQ
https://www.thomann.de/gb/glockenklang_3band_electronic.htm (bit more pricier than I expected when I looked in January) at £135. I really don't know how this will sound but I'm sure it will be a bit of an improvement
Hardware: some shonky stuff going on there. The single bridges grubs screws for saddle height adjustment were poor, 9 out of 20 were not adjusting. Luckily it wasn't the tapped holes into the bridge(s) just crap thread rolling on the screws. £6 off Amazon for 20 new ones.
Tuners are not great either, some play in all 5, just splashed out on some Warwicks - £65 but any half decent tuners half the price or less will do much better than the stock.
All in all it's racking up (for me) to £206 ($262, 241.50€) so that'd be the ballpark you would be looking to punt into.
If you are interested in the 6 string they are selling new at £299 ($380, 350.50€) here from
G4M 972 Fanned Fret 6-String Bass Guitar, Purple Burl Burst at Gear4music
You would have to add shipping to that if you are not in the UK plus the cost above for the mods and plus the pickups of your choice.
I will say on the 5 string that the neck is sublime, I've never felt anything as nice, absolutely zero fret sprout, joy to play, no fret buzz anywhere, low B is best I've ever heard on any 5 string and the other strings are just as good. Not as deeply fanned as a Dingwall but not as shallow as an Ibanez, I really think there's been some serious thought gone into these models