Sunday, 24 May 2015

audio - What exactly does Watts and dB signify?



Now this is confusing.
At some point i read that higher watts does not neccesarily signify high volume sound. An amp rated at 100w and other rated at 50w dows not mean the former is 2 times louder. Only slightly loud by 3dB which is nothing. To make the latter twice as loud, i should pump the wattage 10x.


Now there is also one thing to consider. SPL.
If i connect a lower SPL speaker to 100w amp and a higher SPL speaker to the 50w amp, the 50w amp will be actually louder than 100w.


Now you tell me, if I am designing an amp, what Wattage amp am i supposed to make. All the time i was looking looking for a 200w ic. After all this literature i went thru, I can also do with a 15w ic and connect a high SPL rating speaker to it. That will suffice?


What does the amp Watt actually tell me?
When am i suppose to use a higher or lower watt amp?
What does it mean to the battery, and speaker?

And ultimately to the listener?


And talking about speakers, i also read somewhere a high end speaker has more impedance than a low end one. Most of the ic datasheet lists for a low impedance ones' - 4ohm. All the while i thought the amp was powerful enuf to drive such speakers? So for high impedance it wont be useful?




No comments:

Post a Comment

arduino - Can I use TI's cc2541 BLE as micro controller to perform operations/ processing instead of ATmega328P AU to save cost?

I am using arduino pro mini (which contains Atmega328p AU ) along with cc2541(HM-10) to process and transfer data over BLE to smartphone. I...