Cut and Presence Controls

[PCollen]

I thought that the CUT control was an alternative to the Presence control for amp having no NFB. But I recently noticed some fixed-biased amps with NFB having BOTH Cut and Presence controls. Are having BOTH highly desirable, or overkill.

[Bear]

I've thought about doing both in an amp. More flexibility of tweaking not just the amount but also the texture of treble.

[jaysg]

I put a cut in my liverpool. The extra connections are very short...on the order of 1 inch. For diy, why not?

[Buschman]

I put a cut in my Express. It is not needed.

[JamesHealey]

The Komet amps had Cut controls.. dunno how useful they are I tried one in my Express based amplifier and wasn't too sure i'd ever use it so it's gone now.

[PCollen]

I put a cut in my liverpool. The extra connections are very short...on the order of 1 inch. For diy, why not?

And....?

Do you feel that the Presence, or the Cut, has more sonic influence ? Which do you tweak, and which do you set and forget ?

[jaysg]

I put a cut in my liverpool. The extra connections are very short...on the order of 1 inch. For diy, why not?

And....?

Do you feel that the Presence, or the Cut, has more sonic influence ? Which do you tweak, and which do you set and forget ?

I'm glad I have it. I tweak both...starting with Cut dialed out. It seems to affect slightly lower highs than the presence. I also adjust Cut for different guitars more than the other knobs (which stay around 12 to 1 o'clock, as others have noted).

[Gaz]

I find the cut control to be redundant in an amp with a presence and treble control. It does do something a little a different, but between the treble, presence, and tone control on the guitar I can get pretty much what a cut control would do. I do think it's valuable, however, in a non-NFB amp, especially with EL84s. IMHO, I say use the panel space for something else.

[funkmeblue]

I have an express I built with a 6sl7 preamp and it doesn't have as much gain. I crank the prescence and it gets nice and mean, use the cut control to tame some of the highs.

[Structo]

Remember that most presence controls are in the form of global negative feedback which cleans up the distortion a bit.
The addtion of the cap just adds some tonal benefits to it.

[funkmeblue]

as I understood, turning up the presence control boosts the highs by "cutting the amount of hight frequencies being cut out" http://www.aikenamps.com/ under... tech info.....advanced......frequency response shaping via feedback. That's what it does in my amp anyway, more gain but more highs. I'm sure Ken had a plan.