20 Jul
2015
20 Jul
'15
3:45 a.m.
On Sun, 19 Jul 2015, fred wrote:
Could you go further on this, please?
How does impedance impact relative volume on input?
If you see good input volume, do you have to care about impedance?
And...?
Thanks!
Volume is probably the last thing to worry about. All tone shaping
(intended or not) is based on capacitance/inductance and resistance.
Impedance is also a mix of the three at any one frequency. A microphone
output is generally 150 to 600 ohms (except for special use or really bad
sounding). That impedance is mostly inductance in the average dynamic mic,
but not for a condenser which while based on a capacitor will have it's
own preamp giving a more resitive output. A guitar has an inductance as a
generator and that inductance coupled with an input resistance will make a
filter. Normally a high resistance is chosen so that this filter is
outside of our hearing range. In guitar amps, the input impedance is
carefully chosen for "that sound".
Note this is a _very_ basic explanation. There is a lot more to it.
--
Len Ovens
www.ovenwerks.net