5 band Tone Control question [Added Mesa Graphic EQ - DIY version with gyrators]

[kagliostro]

By-case I've seen this schematic of a 5 band Tone control

the schematic was in a page written in cyrillic and trying to use an online translator wasn't of much help as to understand about what they were talking

Why we don't see this kind of tone control in guitar amps ?

Long time ago there was a dicussion on the forum, but I didn't remember the content

Thanks

K

[jjasilli]

One reason:  the tonestack is considered to be perfected in the FMV stack.  Of course not Everyone agrees, but statistically speaking it's a done deal.  That's already 2 or 3 tone dials on the amp to fiddle with while trying to play live music, not to mention a possible presence control on the amp; and tone control(s) on the guitar!


In the studio, mutliband eq becomes more feasible, though some guitarists may opt for it on stage.


Another reason for a simpler tonestack is too much insertion loss, unless you go active.  Then the question is SS or tube power.  Prior discussions focus on Ampeg tonetacks; or the Mesa Boggie / Carvin approaches.

[kagliostro]

Simply Fender - Marshall - Vox 


K

[HotBluePlates]

The bottom-most 7.3kHz control probably won't be useful inside a guitar amp.

Otherwise, just try it and see what you think.

[vibrolax]

Mesa Boogie put 5 band eq's into a number of guitar amps, such as the Mark II-B.  The EQ was island of transistors in the midst of a vacuum tube sea.  The high treble band appears to be 6600 Hz.  I think > 3 band eq is more popular with bass players, some of whom prefer things like rack mounted recording mixer channel strips for the EQ, dynamics (e.g. compressor), and send/return features.

[kagliostro]

A member of DIYItalia developed a Gyrator version of the Mesa Graphic EQ and one other member draw a layout


Pots (slider) are mounted on the opposite side of components



K