Quote:
Originally Posted by pruss
I've run it (or an equivalent app) on a Fire at 40% and on my Galaxy S2 at 100%. But one doesn't expect problems immediately--the question is how long the volume can be sustained.
Anybody know if I can make it safer by keeping the volume low at the low frequencies, or at the high frequencies or the like?
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Low frequencies are more likely to cause heating. High frequencies are more likey to cause impulse damage (causing the speaker voice coil to travel beyond its design limits, possibly damaging it). Hopefully, the device is designed to prevent driving the speaker into potentially damaging conditions, but audio test CDs do come with a warning that they contain audio waveforms (such as square waves) that could potentially damage speakers and should not be used at full volume.
Because the speakers are so small, they need to be driven very hard to produce a useful volume level, so normal operation is near their design limits to begin with. Boosting it is useful for voice (such as audo books) but loud music (especially with loud low-frequency base) could potentially damage the speakers. And because small speakers are not good at producing low frequencies, users would be tempted to drive them even harder at low frequencies if given that option.
SUMMARY: For the safety of the speakers, it should be okay to boost the mid and high frequencies much more than low frequencies (which also makes spoken words more understandable).
If you want a warning, you should warn about boosting low frequencies too much. Again, that is dependent on what hardware protection is designed and programmed into the kindle fire.