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Presence
A control on a guitar amplifier that boosts the upper frequencies above the normal treble control range for added high-end. This control is usually a shelving type of equalizer, and is normally implemented as a lowpass philtre inside the global negative feedback loop. By decreasing the amount of high frequencies that are fed back, the high frequencies at the output of the amplifier are boosted.
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- Part of Speech: noun
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- Industry/Domain: Consumer electronics
- Category: Amplifier
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