The sound from either of
these styles will be almost
inaudible until the shell is in
place, as the shell is the baffle
that directs the sound out the
rear truck opening.
If you want to test this loco
before you install the shell, just
wrap your finger around the
end of the weight. The sound
should come up significantly.
It won’t achieve the ultimate
timbre or volume until the
shell is installed.
Over the truck
with a baffle
Similar to the Atlas ver-
sion [5] and [6] is a method
that works on a lot of locos.
I fit the speaker over the
rear truck of the Kato SD45,
shown in [7]. Once I had a
good dry fit, I used styrene
to build a baffle to keep the
sound coming off the front of
the speaker directed down-
ward to the truck opening.
This was done because the
weight is not a close fit, like
the Atlas version. I’ve tried
this style of installation with
DCC - 7
