2 Atlas Silver Series 8-40B's - Fantastic running. I removed all factory electronics and hardwired LM-1's in each. Each has a single Railmaster Hobbies DSM-8 for a speaker.
2 Atlas Silver Series 8-40CW's - Good running, some drivetrain noise. I plugged LM-1's into the factory board using a 9-to-8 adapter from TCS. Dual 30mm speakers in each.
1 Athearn Blue Box GP50 - Very old locomotive. Original motor and gears. NWSL semi-scale wheels. Thoroughly tuned the drivetrain, hardwired everything. Currently has a Iphone 5 speaker in it that will get removed and replaced. Locomotive runs very well with a LM-1.
1 BLI SD40-2 - Decent running, though I did have to replace a faulty motor. Speaker setup is less than ideal (made for dual 28's, but sounds terrible). Will probably remove and replace with somethign else. Not much room to work with in there due to the weight. Decent running with LM-1 hardwired.
1 Kato SD40-2 - Good runner, some drivetrain noise, very lightweight. Currently has LM-1 plugged into the Kato board with a 9-to-8 adapter from TCS, but that is only temporary until I put the locomotive on the bench for detailing and weathering. At that point all the factory electronics will be removed and the LM-1 probably replaced with LM-2S for more storage for sounds.
1 Athearn RTR GP35 - Remotored with Kato, drivetrain tuned. Extremely smooth and quiet runner, my favorite locomotive for switching. LM-2S hardwired in with 2 sugar cube speakers, very nice sound.
1 Athearn Genesis SD70MAC - Mediocre runner, lots of drivetrain noise even after replacing the motor and entire drivetrain. LM-1 hardwired in with DSM-8 speaker. Decent sound.
2 Athearn RTR C44-9W's - Remotored with Kato, extensive drivetrain work to make them quiet. Very smooth, and mostly quiet runners. Both have LM-2S modules hardwired in, and both have 4 sugar cube speakers each. They sound excellent. My favorite mainline locomotives.
1 Athearn Genesis ES44AC - Smooth runner, very quiet, very heavy. LM-2S plugged directly into the factory board (lots of space), with all wire connections to the board soldered. 4 sugar cube speakers, excellent sound.
1 Athearn Genesis SD70ACe - Good runner, noisy drivetrain. LM-2S hardwired in, single 28mm round speaker in factory enclosure. One of my better sounding units...the custom K5LLA horn I loaded on there is extremely loud.
1 Athearn Genesis GP7u - Very smooth, very quiet, but very light. Slower locomotive due to the gearing. LM-2S hardwired with dual sugar cube speakers. Sounds good, runs well.