https://guitarnoise.forum/live-sound/pre-amp-power-amp-noise-gate/ Guitar Noise Discussion Board en-US Thu, 04 Jun 2026 06:08:47 +0000 wpForo 60 https://guitarnoise.forum/live-sound/pre-amp-power-amp-noise-gate/#post-343742 Tue, 01 Dec 2009 08:59:37 +0000
however, a power amp increases the power of a signal mainly by current gain, which allows it to drive very low impedances (= Speakers).

the most familiar case: a guitar amp is usually the integrated combination of a pre-amp (input stages) and power amp (output stages).]]> Live Sound gnease https://guitarnoise.forum/live-sound/pre-amp-power-amp-noise-gate/#post-343742 https://guitarnoise.forum/live-sound/pre-amp-power-amp-noise-gate/#post-343738 Tue, 01 Dec 2009 07:16:54 +0000 A power amp increases the amplitude of a signal to send it to the speakers (usually).
A noise gate sets a threshold below which a signal won't pass, and can sometimes be tuned to particular frequencies.

A typical signal chain might be to send the guitar through some floor pedals to a pre-amp, and then through some line level processors and then to the control board which will then direct the signal to the power amps.

A noise gate is really used most frequently as a recording tool, where some really neat tricks can be employed using side-chaining. But it does have some uses in live sound often in combination with delays and reverbs.]]> Live Sound kingpatzer https://guitarnoise.forum/live-sound/pre-amp-power-amp-noise-gate/#post-343738 https://guitarnoise.forum/live-sound/pre-amp-power-amp-noise-gate/#post-37899 Tue, 01 Dec 2009 05:54:27 +0000 Live Sound natemansi https://guitarnoise.forum/live-sound/pre-amp-power-amp-noise-gate/#post-37899