Hi Marcel,

I think alarm clocks usually use small speakers designed for
high-pitched noises. I used a small magnetic one in my alarm clock,
but they often use piezo speakers or even piezo beepers (which only
need power, they generate their own sound). These can be quite loud
without clipping.

Sean


On 9/2/06, Marcel Birthelmer <marcelb.lists@gmail.com> wrote:
> Hi all,
> the last part of my ongoing project that I need to design is the audio output.
> The project is an alarm clock, and quite frankly, I'm not so sure what
> kind of output power I should go for. I want enough power that it
> sounds clear at higher volumes (unlike most common alarm clocks that
> start clipping before they get loud), but I don't really know how much
> that is.
> Another concern is space; I'd like the final product to be fairly
> compact, so preferrably I'd use two or three smaller units in stead of
> one big speaker.
> So to sum up, these are my questions:
> - What kind of output power should I aim for?
> - How can I achieve this with physically smaller speakers?
> - What is a good supplier for speakers etc.?
>
> Thanks for any advice you guys can give me on this; it's my first
> project with this sort of analog stuff, so all the help I can get is
> appreciated.
> - Marcel
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