About 20 years ago JBL did research and found out that most speakers are damaged by over driving the amp into clipping. When an amp clips the effective power of the clipped waveform can be 2 or 3 times the rated power of the amp. John
Whats also interesting is that on my 3.6R/SE Maggies the bass foil gives out earlier with the Pathos AMP than with the big Krell. the more stable power the AMP can deliver the more control it has over a speaker and can be pushed louder. At least thats what i have experienced. The pathos cannot drive below 4 ohm loads and delivers 95wpc at that rating. The Krell can drive below 1ohm loads and delivers 440wpc into 4 ohms. Some speakers react more than others id say. But its usually the cllipping of the AMP. I would buy a AMP that is more powerfull so that you can make sure that it does not clip. Your ears will hear when the speaker is stressed.
Sensitivity of speakers is with 1 watt of power , at 1 meter in a anechoic room what is the db level that a speaker will produce. Most home speakers seem to be in the 86~90 db range. So if a speaker sensitivity of 90db at 1 watt it will take 10watts to get it to 100db and 100 watts to get to 110db at 1 meter.
Now if you are 2 meters away the db level will drop by 6db. John
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