Kit: MX644D; IceCube28X18X08-2W
Dapol have innovated with their 14XX in O gauge, with a plug-in PCB to house both decoder (21pin) and speakers. The PCB comes
with a pair of clip-in housings which will take a pair of the 15x11mm Sticky Gasket speaker components. Once the housings are
clipped back onto the PCB, spring clips on the speakers make contact with points on the board. Very neat.
If you want simple, then stick with that approach, and the results are quite reasonable. However, if you don't mind just a
little more effort, a dual IceCube 28x18x08 2W speaker can be used instead, as shown here...
Wires from the IceCube can be neatly threaded through holes in the PCB, and soldered to one pair of the contact pads. Then,
using the sticky pads provided with the model, the IceCube is secured to the board, also acting as an insulator so that none of
the metal parts of the speaker touch the board. The speaker could just as easily be place the other way up too (with the metal
parts away from the board).
The whole assembly, with the small example stay-alive capacitor, simply slides back into the boiler, using this neat little
arrangement that Dapol have come up with.
Looks like the space is perfect for the 8mm dual IceCube!
Photos courtsey of John Myall