Originally Posted by
davef
Something isn't right... That is an extremely powerful amplifier (we have one in our demo room) I have never had the peak indicator light up, not even once, even with a listening distance of 12-14 feet away from the speakers. Please keep in mind that if that peak indicator is lighting up, you are hitting the Sierra-2 with at least 200 watts, which is well above their max power handling capability. You risk doing serious damage to the speakers.
In addition, at only 4.5 feet away, it is important for you to realize that you are reaching a volume level of above 110dB, which can easily cause permanent damage to your hearing in less than a minute... This may be why you are seeing so much movement on your ribbon tweeters.
Amplifiers do not break-in... Power amplifiers like these have fixed gain, and the peak indicator measures either the voltage level of the amplifier output, the output current, or power supply ripple current, either way - when the peak indicator lights up - your amplifier is reaching its absolute maximum output. Only 2 possibilities here, you are either listening at a ridiculously high volume level and pushing the speakers too hard, or there is something wrong with your amp...