Go Down

Topic: How to make speaker louder. (Read 1 time) previous topic - next topic

pyroknife

I am using the speaker found on http://www.jameco.com/1/1/1925-gc0201m-32-speaker-round-32ohm-8-inch-dx-169-inch-h-micro.html. It is hooked up to an arduino UNO R3s pwm pin with a series resistor of 50ohms. The loudness is not getting anywhere near the specified 78dB even when I send 5V directly to the speaker. Anyone know how I can increase the loudness?

pyroknife

Oh and the max power rating is .2W. Using the equation P=V^2/R gives .2=V^2/32 => V=2.5V. 2.5V across the speaker is not loud at all.

teddyz

The loudness is probably only possible to reach within the speakers frequency limits. For this speaker 700Hz to 8000Hz.

For the lower frequencies a box (or similar) is needed to stop air from going between front- and backside of the speaker.

daGuru

I recommend u build a simple AMPLIFIER circuit like this one:

http://youtu.be/E5NjcZkJtFM

if u r too elite then search for a better amp circuit on YouTube and if u r too novice then find a simpler one.

Good luck


Go Up