DCC Impulses Column - 6
of sound” worked better than the point source located in the
middle of the flat car in this instance.
Speakers are usually marked as to polarity. If you look at the
terminals on the (identical) speakers you are installing, you will
probably find some mark next to one of the terminals. It may
be a drop of paint or a variation in the shape of the terminal
or something. Absent any other indication, just line the speak-
ers up on your workbench, cone side down with the terminals
facing you. Take a marker and put a dot next to the terminal on
the right. Now you have a mark to use in wiring the speakers.
Two speakers
Be sure to know the allowed range of load impedance before select-
ing and wiring two speakers. Why? As I mentioned previously, when
7: Two speakers wired in series – the final impedance will
be twice the speaker rating – 8-ohm speakers yield a 16-
ohm load or 4-ohm speakers yield an 8-ohm load.
7
MRH-Jan 2014
