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[quote user="davidmbedard"] You can get away with one nice large oval speaker with a nice baffel.David B[/quote]David is quite right.  This is the simplest solution.....but the definitive word is "large".  If you can get a large oval in, you may not notice any difference between one and two speakers.  However, due to the rectangular shape of the tenders there is not much of a large oval that can be placed in there.  You will easily double the air movement with two matched ovals.  It is a good idea to match them, btw, rather than use two different sized speakers.With a little care on the sealing of the speaker margins to the floor (or in some cases the "roof" of the tender...or under the coal pile) you will not need a baffle.  In fact, an added baffle takes up room that you could use by maximizing the size of the speaker.  It is common to simply use the entire tender as the baffle.
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