iaminfested

Hi,

I'm new to the forum, i was just wondeirng out of curiosity what the presence tone knob actually does, obviously it alters the sound but what is actually going on?

I have a DSL100 and play punk/pop/metal shit and i use it on my lead channel, but i've never really figured out why i use it, haha.

Any ideas appreciated.

Thanks,

Also, just to add to the TSL/DSL argument. i had a TSL100 but sold it to replace with the DSL100, for some reason the TSL100 didn't cut if for me when playing ska/clean bits in a band, the sound was just unbeleivably muddy, yet i adore the clean on the DSL, weird huh? i can't remember if the TSL had dual tone settings, i think it did - this is definately a plus as i would love dual settings on the DSL, but even with dual settings on the TSL i couldn't create the clean sound i wanted.

Cya

WrenchDevil6

Can't speak to the DSL/TSL debate, but:

Presence reduces negative feedback in the power amplifier section to provide a small amount of boost at frequencies above the treble control.

Most guitar amps have a "presence" control, which boosts the high frequencies. It accomplishes this not by actually boosting the highs in the forward path of the output circuit, rather by cutting the amount of high frequencies being fed back. This effectively reduces the amount of negative feedback at those higher frequencies, which results in a boosting of the highs at the output. Some guitar amplifiers have a "resonance" control, which does a similar thing, by cutting the amount of low frequencies present in the feedback loop, thereby boosting the low frequencies in the output. The amount of boost is equal to the amount of negative feedback. If the amp has 6dB of feedback, there can be at most a 6dB presence or resonance boost. This means that if you reduce the amount of feedback for more gain, you will also reduce the effectiveness of the presence and resonance controls, likewise, if you increase the amount of feedback, you will increase the effectiveness of these controls.

Think about it like this... If you stir a mud puddle it gets muddy, if you had the ability to turn a knob and cause the water to get clear, that would be the presence knob. When a high gain/OD situation, I tend to dial back on the treble proper and dial up the presence. Doing so eliminates, for me, the fuzz at the higher volumes and makes the whole EQ a bit tighter.

big dooley

presence regulates the highest end of you EQ so going from high to low its like this:
presence, treble, middle, bass, resonance
(resonance pot on JVM models only, but the DLS uses the deep switch for controlling those ultra lows)

iaminfested

wrench devil, great summary. thanks for your advice. i think what you said about the OD situation, holding back on the trebble and increasing the presence has given a good idea of how presence can be put into practice, il have to have a play around with it tonight.

thanks again!