Jaguar bass EQ mod

[abbey road d enfer]

here is a link http://www.freestompboxes.org/viewtopic.php?f=3&t=19659

This link is open to members only

 

[abbey road d enfer]

It does not look like a bad circuit, what don't you like?

This circuit keeps midrange (around 300 Hz) constant and provides LF and HF boost. I can understand why someone would not like it. In combination with the typical midrange dip associated with the standard Fender tone stack, that can be too much. In fact this circuit is a derivation of the Fender tone stack. Too much of a good thing can be annoying.

 

[Newmarket]

I recently stumbled upon this Nice & Massive Collection of Circuits, mainly for passive basses:

scroll down here:
http://161589.homepagemodules.de/t29f2-Cadfaels-kleine-Schaltplan-Sammlung-fuer-passive-E-Baesse.html

or direct link to the pdf:
www.ak-line.com/medium/Bassschaltungen417.pdf  (7.65 MB)

It's in German, but the schematics & diagrams will come across.

Enjoy!

Impressive 

 

[Newmarket]

Welcome.

> passive eq into

Passive EQ right off the guitar pickup is tricky and often non-optimum. Signal level is low so any loss puts you closer to universal hiss. Pickup impedance is high and very variable (inductive to a point then capacitive) which foils many reactance-based EQ schemes. Inductors around a pickup must be VERY high impedance. Stray capacitance sucks the top away.

If you can support active, everything changes. But active is a hassle. And there must be an instant bypass for when the battery quits, or just gets loose, mid-solo.

The one thing which works dead-simple is a capacitor across the guitar to cut the high end some or more, for mellow rhythm vamping.

But it is an old-old goal and you can find several old passive EQ guitars. Some inordinately complex, expensive, and not in production long (which is a hint).

Have to agree.
Unless you specifically want High source impedance (eg in front of a 'Fuzz Face' type fx or some specific 'coil interaction' between pickups) then passive EQ is making life difficult for the reasons outlined - level loss / high Z components etc.

Not sure the battery running out or getting loose is really something we can worry about. Got to check battery charge and maintain connections - same as a jack socket. Lots of bass guitars won't work effectively with a low / exhausted battery as they have lowish impedance pickups with a lowish output eg EMG.

But it's much better to be working with a low source impedance signal at a healthy level for EQ etc.