sound decoder ?

[NW Modeling List]

Hi Jimmy,
Sorry I am away from home so I cannot give you a photo but I can better  
describe it! 
Most speakers are installed with the magnet inside the speaker enclosure.  
In a bass reflex install you simply face the speaker into the enclosure with 
the  magnet out side. 
The most important part of this is that you seal the lip of the speaker to  
the enclosure with silicone and let it dry well before making noise! LOL  
This method does a couple of things it brings up the bass as best as can be 
 with such a small speaker and lets the lower end of the sound spectrum 
ring out  better then the highs. You will actually find the speaker to be 
louder with out  the rattle. 
There is a formula that speaker enclosure designers use in fact there is  
even an app for that! It takes in all the specs of the speaker and the audio  
range you want the speaker to work at. What makes most speaker installs 
rattle  is the fact that the cone in moving to far in and out. It can only do 
this so  fast before it just rattles! I have found that for most HO speakers 
that are  about 1 inch in diameter work best with an enclosure that is about 
3/4 to 1 inch  cubed. Example 1 X 1 X 1. The thicker the wall material the 
better and add as  much cotton as needed to keep it from vibrating the brass.
Try it! I install almost all my large HO steamers this way. 
Again your ears may  vary! Try it both ways.
As someone else mention face the speaker up through the coal load! It  
always sounds better then from coming out from under the tender!
Ray Russell Sr.
 
 
In a message dated 10/26/2015 2:53:41 P.M. Eastern Daylight Time,  
nw-modeling-list at nwhs.org writes:


I recommend a bass reflex  install.
Ray,
What exactly is that?  Any photos?

Jimmy  Lisle

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