At Eastside Trains a customer was coming in to pick up their brand new Tacoma Rail SD70ace from Lionel. Straight out of the box onto the test track. The customer wanted to see it run. Started up the loco, 10 seconds in the speaker started making a terrible sound....I ended up getting a customer another one from stock and tested that. It was good. After the customer left I dug into the loco and found this......
A huge glob a solder touching the speaker frame which is then grounded out to the rest of the loco. This caused the speaker to make that terrible sound and blow the amplifier out on the sound board. We have contacted Lionel for a replacement and fixed this issue.
So double check your engines just in case.
This is why we and I stress to customers and the comunity to test their items before they leave the store. One of many things we have caught before sending items out.