SPeaker Boxes for Decoders

Model Railroader General Discussion (Model Railroader)
1

I just recieved two Soundtraxx DSX 150 Sound Decoders (with no manual[%-)] ) and after looking at the Soundtraxx Website I’m a bit confused. My original understanding on speaker boxes was to make them as air tight and as small as possible but according to Soundtraxx as long as you seal up the front around the speaker (not over the face) and seal it in you’ve got a boxed speaker. I figured this cavity would be too big. The speakers I’m using are the oval type 1.38" x .63" x .28", which according to Soundtraxx would mean the minimum size box would be 1.38"L x .63"W x 1.38"D or would it?

If anyone has any insight I’d appreciate it.

Fergie

2

Fergie, there is a lot of physics involved in sound, just look at the complex baffle and tube arrangements in Bose speakers to get some idea that a simple box may not be all that is needed. Bruce from Litchfield station made a Powerpoint presentation at the NMRA a few years back discussing this very issue. It was on his web site but I can not seem to see the link to it on his web site for the time being. Perhaps you could drop him an e-mail and get a copy?

3

http://www.litchfieldstation.com has all the different Soundtraxx speakers and their corresponding enclosures.