Quote:
Originally Posted by pruss
How low is "low-frequency"?
I could set SpeakerBoost to not boost the lowest frequency, and then just boost the higher ones.
The central frequencies of the five equalizer bands on the Fire are:
60 Hz
230 Hz
910 Hz
3600 Hz
14000 Hz
Any advice on how to shape it for safe boosting?
I just tried not boosting the 60Hz at all, boosting the 230Hz at half of the user-specified level, boosting the 14000 Hz at 75% of the user-specified level, and boosting the others at the user-specified level. Voice was nice and clear.
|
Without knowing how the kindle audio hardware and software is designed, we are really just guessing. If this were a company project, you might use a sacrificial kindle or two to see if and how you can damage it, and then keep your maximum settings well under those limits. If I worked at amazon and I had access to the kindle design specifications, I would set my limits to within the design limits of all the audio hardware components in the device.
With no "double-blind" testing to determine the cause of reported speaker damage, without potentially destructive testing, we can only guess at what are the safe limits.
EDIT: You could examine the speakers to determine their make and model, then lookup their specifications. Then you could attach instruments to measure the power (voltage and current) and the temperature of the voice coils, while driving it at various frequencies and amplitudes, with various waveforms (square wave being the most destructive). That would let you figure out what SOFTWARE settings will keep the speakers operating within their design maximum continuous operating range limits. Other than that, you could just let the end USER decide how loud is loud enough, with a disclaimer that any damage is not your problem if they overdrive their speakers to destruction.