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DC Servos
https://sound-au.com/articles/dc-servo.htm
A power amplifier will run from fairly high voltage supplies (typically in excess of ±25V), but the DC servo needs an opamp, which requires a lower voltage (around ±15V maximum). That means additional regulation is needed, which may only include a couple of resistors and zener diodes, but may use regulator ICs instead.
What is a servo? - Universal Audio
https://www.uaudio.com/webzine/2006/december/text/content2.html
In the context of audio circuits, a servo is usually an active element used in feedback in order to null or reduce an amplifier's offset voltage. "Servos provide a sophisticated way to reduce offset voltages in audio circuits" Consider Fig. 1. On the left is the schematic for a differential operational amplifier (op-amp).
Chapter 23 The Design of DC Servos - Audio Power …
https://www.oreilly.com/library/view/audio-power-amplifier/9780240526133/032_9780240526140_chapter23.html
Chapter 23 The Design of DC Servos DC Offset Trimming DC Offset Control by Servo-loop Advantages of DC Servos Basic Servo Configurations Noise, Component Values, and the Roll-off Non-inverting Integrators … - Selection from Audio Power Amplifier Design, 6th Edition [Book]
Rythmik Audio • Subwoofer plate amplifiers
http://www.rythmikaudio.com/amplifiers.html
The information here is to provide an overview of the servo amplifiers used in our products. All of our amplifiers have the same cut out dimensions so that they are interchangeable. The Servo version of these amplifiers are used in all of our finished subwoofers and custom installation kits. Here we list them for side-by-side comparison.
Servo-Controlled Amplified Bass | What's Best Audio and ...
https://www.whatsbestforum.com/threads/servo-controlled-amplified-bass.17008/
The amplifier in the servo-system is part of a feedback loop. Hence, unless you know the amplifier characteristics it is impossible to make the servo-control system function accurately. With your Genesis 2, even the woofer cables are inside the feedback loop. Hence, it is important to design everything as a whole. Click to expand...
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