A.F. power limiter

Owing to their relatively low rating, tweeters (high-frequency loudspeakers) form the weak link in an audio system. If the volume is suddenly turned up too high, the risk of the tweeters being damaged irreparably is high. Such an impetuous and costly mistake, can, however, be avoided in two different ways. The first is to curb your desire to turn up the volume to levels that the loudspeakers cannot handle. The second is to build the power limiter presented in this article ... it's much safer than controlling yourself when you're adjusting the volume of your beloved audio system.