Speaker cavity dimension

[polekat]

Thanks for the info. I will take you fellows advice.Could you advice me what type of speaker you used and does it come with a enclosure.  

                                                                              Thanks for your help

[cacole]

I've put sound into two of those and agree with David M. Bedard -- don't put the speaker on the bottom.  There's room in the rear of the shell for an oval speaker and enclosure.

[polekat]

HI, I have a early model HO Kato SD40-2 and I would like to install the speaker in
the Fuel Tank like the later model HO Kato SD40-2 mid.production. What i,m looking for is the size
of the speaker cavity. Diameter and depth. Thanks