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Speakers causing amplifier instability
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<blockquote data-quote="Steerpike" data-source="post: 75202" data-attributes="member: 807"><p>Two things that don't seem right for me with this situation:</p><p>(1) what is 'loud'? Loud for me is a 20W valve amp. Loud for someone else is a 1000W class D. </p><p></p><p>(2) you cannot reliably and repeatably set maximum safe power delivery with just test tones. Many factors affect the actual power delivery to the loudspeaker, and it cannot be determined by something as simple as a mark on the volume knob.</p><p></p><p>A 3dB increase is barely noticable by ear, yet represents double the electrical power to the lodspeaker.</p><p></p><p>Distortion is what usally damages lodspeakers - when the equipment is otherwise in perfet condition. Some people are not tuned to recgnising amplifier overload, so it may be happening without detection. </p><p></p><p>Putting a lightbulb (21W car brake light as a starting point) in series with the speaker as an experiment can be useful in showing how 'loud' it really is electrically. The non-linear resistance of the bulb is also helpful in limiting damage to the speaker - though it can affect the sound quality so isn't great for long-term audiophile set-ups.</p></blockquote><p></p>
[QUOTE="Steerpike, post: 75202, member: 807"] Two things that don't seem right for me with this situation: (1) what is 'loud'? Loud for me is a 20W valve amp. Loud for someone else is a 1000W class D. (2) you cannot reliably and repeatably set maximum safe power delivery with just test tones. Many factors affect the actual power delivery to the loudspeaker, and it cannot be determined by something as simple as a mark on the volume knob. A 3dB increase is barely noticable by ear, yet represents double the electrical power to the lodspeaker. Distortion is what usally damages lodspeakers - when the equipment is otherwise in perfet condition. Some people are not tuned to recgnising amplifier overload, so it may be happening without detection. Putting a lightbulb (21W car brake light as a starting point) in series with the speaker as an experiment can be useful in showing how 'loud' it really is electrically. The non-linear resistance of the bulb is also helpful in limiting damage to the speaker - though it can affect the sound quality so isn't great for long-term audiophile set-ups. [/QUOTE]
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Audio and Video Talk
General Discussion
Speakers causing amplifier instability
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