Thanks, Mike! I look forward to hearing the results of your first sound install! Good luck!
I'm going to be using the SDXH166D, but I haven't installed it yet. I'm going to download a new 16 bit sound file for it, from the Digitrax site. I'm using it in an F7, and the file that's in the SDXH is a generac EMD that will probably be fine for your GP38.
There's lots of sound options. TCS has some installations on their web site.
https://tcsdcc.com/
According the general consensus of those in here, ESU is suppose to be the best.
I'm using the SDXH because it's my first sound install, and it's about 1/2 the price of the ESU.
You do get what you pay for, as in everything else in this world, it's the modeler's choice.
Mike.
My You Tube
I'm investigating the possibility of adding sound to my Athearn BB GP38-2. The locos have been rewired to a 9 pin digitrax harness and motor isolated. There's a number of decoders that would work for motor control only such as the digitrax DH126d and DH166d. I haven't been able to find any recommendations for sound decoders for the BB Athearn on manufacturers' sites. I have seen a youtube installations using the SDH164 and SDXH166d. The 166 version claims to be 16 bit sound and comes as a kit that includes a speaker for 55 to $60 online. Is this a good choice? I was thinking of purchasing a couple iphone 4s speakers to try as well. Suggestions would be appreciated!