ok ty ....speaker holes were already there thats y I was asking...thanks acy and NM for all the help...just got to measure for the right size speaker...ive seen them  ranging in size from 22 to 28 mm

ty for all the info...I will check to see if decoders are installed, if so i will see if they are installed correctly, ive been checking out different decoders online and if i need to buy decoders, next question i have is my locomotives are dcc ready for speed, direction, and lighting....if i buy a decoder that offers sound as well, will the sound work on a locomotive that is specified as dcc ready for speed, light and direction?? Cause the Bachmann Spectrum steam locomotives i have are 8 pin plugs...and i have seen several HO 8/9 pin plug decoders for steamlocomotives with sound....If i can add sound to my locomotives as well that would be really great!! Please let me know!! I am obviously new to this whole DCC thing and trying to catch up with the times. I will be doing more online research as well. Hope to hear from you soon!!

to NM....thats exactly what they do on button ten....they buzz but run....so where do i get the necessary decoders  since that sounds like what is needed? But before I go buying decoders I will double check....from what I do understand these Locomotives are supposed to be "DCC On Board" ...

ok so i have 3 bachmann spectrum DCC equipped steam Locomotives....one is the modern 4-4-0 PA & MA...the other 2 are Pennsy K4 4-6-2's one is post and the other pre-war....the 4-4-0 worked perfectly and responded well to the Bachmann EZ Command DCC system....the two Pennsy's work in analog mode but not in DCC operation...and they make a pretty significant humming noise when sitting on the track in DCC operation...from what I understand these locomotives are supposed to already be DCC equipped for speed, light and direction. When I try to program the Pennsy's they seem to respond to the programming but after that...nothing!!! I have had them for about a year but this the first time I actually got to try them out...so they are brand new and right out of the box....any advice, suggestions, or help?!?!?!