I have a number of older Athearn diesel locos that I have fitted with DCC. I now want to equip some with a generic type sound unit and don't know too much about the sound side of things. Looking at the manufacturer's data it seems to me that most suitable units come with an un-baffled  28mm speaker. I'm fairly certain I will have trouble getting a 28mm speaker in my locos especially if I need to make a baffle for it and it looks like I may need to buy a replacement speaker at the same time.

I decided to put some blue lights on the shop tracks for blue flag protection. They turned out ultra bright, not because of the resistor used, but that's the kind of led's that they are. I may tame them down at some point, but not today. Kyle

Hi all,

I have looked at equipping some of my engines with sound and have more then a few concerns, listed below:

1/ Cost, the conversion from a Digitrax decoder to a sound decoder either Digitrax or MRC will add about £50 per unit.
2/ Difficulty of the install in N scale, fiddly, accident prone...
3/ And mostly, sound quality is really poor, tinny thin unrealistic sound which is more distracting and annoying then a good upgrade.

So reading around I came across the following idea and I am interested in opinions.