Originally Posted by saprano
Thanks for that explanation MS, that makes perfect sense. I never knew a heated voice coil can cause that. Thank you also for putting away my worries that my sub is broken.
.....I do plan on getting a F113 this year so maby i dont have to worry about this heated coil as much.
The tone deafness is what i also thought i was experiencing.
Mister House's "explanations" are, to be polite, bull.
Statements such as an "amp peaks at turn on and levels out after that" is false. When an amp is turned on, sub or otherwise, if a signal is being fed to it at the time, the amp will output a signal that is in direct relationship to the input. Nothing more nothing less. And to believe that there is "no way to get the peak power after it has turned on" is bull. The amp or sub can be easily driven (and even over driven) to full power by the appropriate input signal. There is nothing magic about all this.
ARK1, when your sub turned on while watching District 9, you just happened to have it occur at a peak signal level. Yes, it sounded overly loud because you went from no sub output to a high output. The reason you did not experience the same affect when you watched it from the beginning (with the sub already turned on) was because you were already hearing output from the sub that masked the sudden transition to max output. During the course of the movie, your sub was outputting what the audio signal called for. If you had the volume turned up enough and the audio signal was high enough, you could certainly drive the sub to peak output at anytime.
Saprano, if you think your voice coils are "overheating" and you think that you are hearing a decrease in bass output, either you are overdriving your sub to begin with or you have a poorly designed sub. What you are probably experiencing is audio compression. Once you reach a certain loudness level, the input to output relationship is no longer reasonably linear in a speaker. At normal listening levels, a 1 dB change in input to the speaker will result in a 1 dB change in output. At a certain level the speaker will start to compress the sound. It may than take a 3 dB change in input level to result in a 1 dB change in output level. By that point you have probably reached the ears limits and you may not even be able to hear the resulting change in output level. Turn the level down and the compression goes away. Under reasonably high levels, a sub's output does not decrease from the beginning of a movie to the end.
Regarding "tone deafness" here is an explanation:http://en.wikipedia.org/wiki/Tone_deafness
I cannot believe some of the stuff people post in these forums.