Clipping?
Hi, und schon die nächste Frage!
Clipping: ensteht es durch zu wenig Saft von Verstärker, weil der nicht schnell genug von der Batterie was bekommt? Oder weil der Sub nicht mehr schafft?
15 Antworten
Clipping
Hi,
ich habe für meine Frontsystem eine Becker Endstufe die einen sogenannten Anti-Clipping-Schaltkreis besitzt.
Dazu hab ich im Internet folgende Erklärung gefunden;
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Anti-Clipping Circuitry
Electronic device included in some amplifiers to prevent clipping, the overloading of an amplifier in which normal waveforms are chopped off resulting in severe harmonic distortion and output problems. Clipping occurs when an amplifier attempts to reproduce a signal at a high level beyond its ability to cleaning produce power. Clipping results in the distortion of the waveform creating waves with flat tops as they are pushed against a "ceiling" and effectively cut off.
Anti-clipping circuitry keeps a lookout for clipping and attempts to diminish or eliminate it. In most cases the circuitry will momentarily decrease the input signal's amplitude to one which can be handled by the amplifier without distortion.
The best method for reducing or eliminating clipping is to use properly large amplifiers with strong power supplies mated with reasonably efficient loudspeakers. While anti-clipping circuitry will protect the amplifier and speakers, it does not allow them to reproduce the intended signal in its effort to protect the components. While this is certainly preferable to an inoperative system, a system that naturally does not clip very often or at all is preferable (when a system does not clip there is no need for circuitry to prevent clipping).
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Clipping
Amplifier distortion occurring when a high energy wave form (a very loud sound resulting in a large output) is input into an amplifier and the amplifier is unable to fully reproduce it due to power supply limitations or amplifier design limitations resulting in the audio output waves being cut off (the rounded tops sliced off resulting in short waves with flat tops). Clipping creates audible distortion and can be damaging to speakers especially if the clipping is hard and frequent.
Clipping generally occurs when an amplifier is playing at a high level and it is asked to output a large amplitude waveform ("tall" wave with lots of power). The amplifier clips when it does not have the power capability to correctly create the waveform. Instead, as the wave is built it hits a ceiling essentially not allowing the wave to go any higher. Since the amplifier cannot recreate the remaining portion of the wave rising above the "ceiling," the wave is cut off.
Generally, the more power an amplifier has (especially relating to the quality of the amplifier's power supply) the more immune it is to clipping. For this reason, larger amplifiers tend to provide better quality sound at loud listening levels since they clip less often (if at all) compared to similar but less powerful amplifiers.
Clipping may be heard in loudspeakers as an abnormal, non-musical sound. It is unpleasant and it may damage speakers (with tweeters being particularly susceptible). This occurs because a speaker cannot produce the flat-topped waveform sent to it by the clipping amplifier.
In order avoid clipping, do not play a sound system at excessively loud levels and make sure the amplifiers being used are large enough to recreate the sound levels in the given space. Generally, use the largest amplifiers reasonable, as they are less likely to clip and damage speakers. It is much more dangerous to clip loudspeakers by using a small amplifier lacking in power than to use a large amplifier even if that amplifier's power ratings are greater than those recommended for a given speaker (distortion, and clipping in particular, causes damage not clean power from a quality amplifier).
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Im großen und Ganzen ist es also ein Phänomen der Endstufe, wenn sie versucht ein sehr hohes Signal wiederzugeben, für das sie zu schwach ausgelegt ist. (also ich schätze mal wenn du zu laut hörst) Resultat sind keine schönen runden Amplituden sondern abgehackte, weil sie an einen von der Endstufe festgelegten (durch Leistung, Bauart etc.) Wert kommt, an dem die Welle oben einfach gekappt wird. (eben Clipping!!) (diese Wellen kann ein Lautsprecher eben nicht ordentlich wiedergeben). Dies führt zu dem fiesen knacken, welches wiederum deine empfindlichen Hochtöner kaputt machen kann. Die Anti Clipping Schaltung reduziert in einem solchen Fall die Eingangsleistung, bis zu einem Level mit dem die Endstufe noch klar kommt. Der Bericht sagt auch, das man auf ausreichend starke Endstufen und effiziente Lautsprecher beim Kauf achten sollte. Also lieber zu stark auslegen als zu schwach.
Grüße Zetterick
http://www.audiovideo101.com/dictionary/clipping.asp