I forgot to put in my message: go to the bottom of the link for how I milled the frame. There are 2 photos of the instalation. I used Soundtraxx decoder # 828020 as it has the caps built in as well as the resisters for LED's. Joe
http://www.bachmanntrains.com/home-usa/board/index.php/topic,22558.0.html
The Soundtraxx 567 sound file is amazingly good. Use it. I would use the AT format decoder as it's cheaper and fits in well with minimum frame mods. Use the biggest speakers and home made enclosures you can.
Richard
Sent you a PM with a couple links. I believe you asked the same question yesterday in another forum and I sent the same two links.
Rich
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.
Has anyone installed a sound decoder and speaker inside a Bachmann GP9. I have never tried to install a decoder before. Thought this might be a good one to start with. Any suggestions?