Cort A4 & Bartolini MK-1 enhancements

Hello there !! I'm a proud owner of a Cort Artisan A4 FMMH bass. (And of course  the proud father of my daughter Elettra.....) You ...

Well ... here is the bass as it was shipped to me: I personally think it's stunning beautiful !!!!! Isn't it ? Where to star...

One of the first thing I noticed as unacceptable detail for a such well designed instrument was ........... this : I mean ...... what...

The heart of many Cort and several other brands of basses is a Bartolini MK-1 preamp. I've read tons of comments on this little thing....

After a very long  & boring  decoding session I finally managed to reverse engineer the whole circuitry ...................................

INPUT STAGE The 2 signals coming from the 2 pickup are processed entirely by the leftmost IC1, used as non inverting HIGH impedance dual O...

EQUALIZER SECTION When the toggle switch is on the ACTIVE position, the mixed (Bridge+Neck) signal, once  amplified by the input stage (I...

Now that We have completely dissected and reverse engineered  the whole  little thing....... I need to be sure about the Factory specs ...

The complete reverse engineering of the equalizer section of the MK-1 is the following: Once more: The Bass & Treble controls ar...

This is an interesting  MOD that can  be performed by just replacing ONLY 1 SMD capacitor located on the Treble filter branch  of the MK-1 ...