Low freq disappears after MEC pickup replacement when blending 50% 50%

[sasabass]

Hello there,

I have a Sandberg Electra TT4 and I tried to replace the bridge pickup to an MEC one with golden metal cover (not gonna lie it just looks so great so I chose it...) and something really weird happened. After the installation it seemed that, with the vol-blend-2bandEQ set up of Electra, both pickups works properly when the blend is either 100% bridge or 100% neck, but when going for 50 50 the low frequency just disappears and the output is quite low. When I turn the bass EQ up then just little low boost could be heard. Maybe someone knows what's going on?

And I also had some other questions, would be kind if someone has experience with this
- The original Electra TT4's pickups (jazz style) has three outgoing wires, the ground one, a red one and a white one. Normally, I suppose that the red wire is for the 9V connection, but it is actually grounded in the original wiring. Contrarily, the newly bought MEC is somewhat "true active" with 3 wires and the red one should be connected to 9V. So what does the original Electra jazz pickup do?
- About the metal covered MEC stuffs: it seems that all those pickups has a small "bug" that when your finger hits the pickup strongly, the pickup will have a small "tta"-noise as if it has recorded your "hit" on the pickup. Is this maybe fixable?

 

[mmbongo]

First issue is that you have them wired out of phase. Reverse the hot and ground on one of the pickups.

Second issue..are you saying that you are mixing an active pickup and a passive pickup in the same bass? Not good. They both need to be the same...either both active or both passive.

 

[sasabass]

First issue is that you have them wired out of phase. Reverse the hot and ground on one of the pickups.

Second issue..are you saying that you are mixing an active pickup and a passive pickup in the same bass? Not good. They both need to be the same...either both active or both passive.

Thank you very much!
I suppose you mean I could swap the bare wire and the hot wire of the active pickup? I tried it but it did not work, just no sound coming out.
To the second point, I guess you are right. The original pickup, although with a red wire coming out, should be a passive one. Thats my bad that racklessly bought an active pickup... [And, well I actually tried to bring back the old pickup and, I somehow destroyed the blend potentiometer......