| If you
have two different
kinds of power amplifiers and want to use them both at the same time,
but
they supply different amounts of gain, what do you do? |
| One
solution is to add a
little bit of attenuation to the input(s) of the amplifier which has
more
gain than the other one. |
| This is
accomplished by
inserting a simple two-resistor voltage divider between the amplifier's
input RCA jacks and the amplifier's input circuitry. Two resistors are
installed for each channel, left and right: |
|
| You should
first find out
what the amplifier's input impedance is. After that, you may have to do
a little bit of experimenting to determine exactly how much attenuation
to give the amplifier. Usually, about 5 to 10dB of attenuation
added
to the higher gain amplifier is enough to match it with the lower gain
amplifier. |
| The
following tables show
the amount of additional attenuation provided by different R1
/ R2 resistor combinations - for use with amplifiers which
have
specific input impedances. |
