Tweaking my amp for more Low-Mids

[TurboGuitarMelton]

Hey guys I have a Laney TT100H and i was wondering what i could do to tweak the electronics to give more low-mids in my sound? 

Here is the schematic diagram! its also attached to the post.

http://musickoncept.free.fr/Pdf/Audio%20-%20Amplifier%20-%20Guitar%20-%20Laney%20Schematics%20Tt100H.pdf

Any help would REALLY be appreciated!
Thaanks,
Daniel

[jjasilli]

In which of the 3 channels do you want more mids?  E.g.: Channel A (FMV), things to try:  decrease slope resistor R1 to 68K or 51K; increase treble cap C1 to 300pF or 500pF; increase mid pot to 50K.

[TurboGuitarMelton]

I was wanting to do the third channel(C). Which cap/resistors specifically in channel three(C) would i need to change the values of? Also which one do you think would have the greatest effect? Thanks for the help!  I'm fairly new to this stuff.

[jojokeo]

I was wanting to do the third channel(C). Which cap/resistors specifically in channel three(C) would i need to change the values of? Also which one do you think would have the greatest effect? Thanks for the help!  I'm fairly new to this stuff.

Increase C8/22n which is .022uF/400v to .047uf/400V which is also 47n/400v. This will give you more bass to dial in which will also affect your low mids on your bass & mid pots when you dial things in.

Next is to directly increase the overall available mids by increasing the midrange potentiometer VR10 which is a 22k linear pot to a 50k linear pot. !00k can be used if that's all you have but will not be all that much more mids that you'll get over the 50k one.

3rd & last thing if you still feel something even more is necessary/wanted is to increase the C9 22n/400 cap like the other using a 47n/.047uF cap here.

[TurboGuitarMelton]

Thank you guys so much! Ill let you know how it turns out when i do it!

[Colas LeGrippa]

even if you change a cap to a lower value, it won't remove highs, it will give you more bottom end and mayl affect the balance of the amp, sometimes leaving a ''hole'' in the frequency spectrum: lots of highs, lots of bottom, lack of mids

[The_Gaz]

First thing I'd do is reduce C9 (mid cap) to 15n, which will technically increase low mids. Easy to see on TSC.