Hi folks:

I'm new to the group and hope this is the right place to post.

I'm looking for a circuit to make a fairly clean sine wave generator (20 Hz to maybe 5,000 Hz) to test resonance of loudspeakers and can't seem to find anything . . . anybody have a suggestion (off-site OK as well).

Found a kit on-line for $30.00 but it cuts off at 40Hz and I wd prefer not to tweak the circuit . . .

Thanks very much

 

Hello,

Perhaps this project will help you:
http://sound.westhost.com/project22.htm

For testing speakers you will still need an power amplifier for it.
(these can also be found on that site : http://sound.westhost.com/projects-1.htm )

Bertus

 

Most computers do have a soundcard. And with some free software you will be able to produce a sine wave that will fit your needs very well. For your frequency range a sound card will produce a quite clean signal.

 

+1

I believe there's even an iPhone app for that.