[sdiy] simple modules

[Ingo Debus]

Am 21.02.2007 um 02:37 schrieb gerald stevens:

> One last question concerning spekaers and amplifier circuits.  Is the
> impedance of a typical speaker 8 ohms over the full audible range of
> frequencies?  Seems like the speaker windings in a large magnetic  
> field
> would have a substantial inductance.

Speaker impedance varies with frequency, not only due to the  
inductance of the coil. Some speaker datasheets include impedance  
curves.


>   Can I treat an amplifier circuit like
> a simple current source?

Hm, usually an audio power amplifier is a voltage source, not a  
current source.

Ingo