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Audio Grade Capacitors: Technology and Applications
https://passive-components.eu/audio-grade-capacitors-technology-and-applications/
Capacitors for use in audio equipment are commonly classified depending on the application they are used for. The three fields of applications are signal path, functional tasks, and voltage support applications. Ensuring that optimal capacitors are used in these three fields helps to improve the output tone and reduce sound distortion.
Audio amplifier output capacitor value - Page 1 - EEVblog
https://www.eevblog.com/forum/projects/audio-amplifier-output-capacitor/
No magic about the output cap. It determines the bass cut off frequency and is easy to calculate. It's just a CR high pass filter. With a 4 ohm-loudspeaker and a 2200 uF cap, the cut off is at ~18 Hz. Caps in the feedback loop are normally for stability, but need to be chosen carefully (meaning proper circuit analysis, not gut feeling). Logged
Audiophile Grade Capacitors - Analog Engineering Associates
http://aeaaudio.com/audiophile-quality-capacitors-going-beyond-the-simple-re-cap/
The best capacitor types for audio circuits are polystyrene and polypropylene. Polystyrene is the first choice, but are only available in values up to .001 uF. Above that value, polypropylene is the type of choice, with nearly the same qualities of dissipation factor (DF) and dielectric absorption (DA) as polystyrene (these are the two capacitor “qualities” that most …
Output coupling capacitor free audio power amplifier ...
https://pubchem.ncbi.nlm.nih.gov/patent/US-2007127742-A1
US-2007127742-A1 chemical patent summary.
How to Pick Audio Capacitors – Charrette & Beget
https://www.maxpierson.me/2009/03/17/how-to-pick-audio-capacitors/
This can mean different things depending on the type of component, but in a capacitor, it is the voltage loss due to resistance in the metal leads and plates. A typical ESR for a capacitor might be .1Ohm, whereas a low ESR model might be .01ohm.Low ESR seems to be a much touted feature for audio capacitors, especially Black Gates.
AUDIO OUTPUT STAGE - radioremembered.org
http://www.radioremembered.org/output.htm
Output Capacitor C-12 - Pentode and beam power tubes introduce a considerable amount of harmonics, which are most notable in the high AF range. Capacitor C-12 across the output by-passes some of these higher frequencies to ground preventing them from reaching the output transformer. The effect is great at the high frequencies as the impedance of the capacitor …
New Coupling Capacitors for Superior Sound! - …
https://www.stereophile.com/content/new-coupling-capacitors-superior-sound-1
New Coupling Capacitors for Superior Sound! The word is out among audio engineers, but is a little slow getting to the average audiophile; the quality of the capacitors in the output stage of your preamp or the input stage of your amplifier is one of the major determining factors of the sound quality. I have done four upgrades to my amplifier input stage over 20 …
Coupling Capacitors
https://sound-au.com/articles/coupling-caps.htm
A capacitor is mandatory for these because they have a 2.5V DC offset, and if this is not removed completely, most DC connected preamps will simply saturate - the output voltage will be 2.5V multiplied by the preamp's gain. A gain of only 6 times (16dB close enough) will convert the 2.5V into the full 15V maximum output from the preamp.
Why place capacitors in front of the line to a (headphone ...
https://electronics.stackexchange.com/questions/339549/why-place-capacitors-in-front-of-the-line-to-a-headphone-audio-speaker
Basically, the smaller the value of the capacitor, the higher the cutoff frequency and so more of the low frequency signal (in this case, the audio bass) is going to be filtered out. The reason why the capacitors are so large is so that the cutoff frequency is lower, filtering out the DC bias while also keeping more of the low frequency signal.
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