Originally Posted by hifisponge
I like your style: lighthearted but very informative.
So then, how do I tell if there is the audio equivelent of a hot finger tip going on inside my tweeter's voice coil? Some sort of audible distortion? Sticking a meat themometer in one of the ports? Military spec thermal imaging?
I like the meat thermometer. All speakers could have dials on the front. "Man was I red-lining last night, wow!"
Unfortunately (you knew it was coming), not so easy. High brow papers have been written about this stuff and it isn't easy. Heating and cooling of voice coils, power compression, audibility of such, etc. Mostly woofs because the wire in the HF transducers is small and it can get "smoked" way faster than a woof. Smoked as in poof!
Pro guys use various measurements, they got all the 'tronics and processing hooked up ya know. Rms, average, etc. Generally agreed, hmm- I think, peak measure is not it. They can fight over RMS vs Average and such. They also know a lot about what is in the signal path. How much juice going onto the box is getting to the transducer, how much can the transducer take ( they fried em in the past ), blah, blah.
Trick is, when you push a tiny wired speak to the limit, you figure it out about the time the voice coil opens!! Yipes!
Think about this, have you moved your head around to make sure you are in the main axis of the tweet. At the higher frequencies, some speakers are fairly narrow in their dispersion and when you get too far off axis that energy can just drop right off. A bit of toe or tilt can make all the difference. Might mean you can ease up on your HF boost!
Hah, first private demo of Audyssey I experienced they had the center channel pointing at peoples knees! Standard center channel goofy stand. Mains were a bit low as well. A pile of us hooligans grabbed phonebook equivalents and commeced to modify the vertical tilt of things and then continued with the audition.