Crackling Sound in On30 Porters

[Uncle Ankle]

  I recently purchased 2 new 0-4-2 Porters with sound & a 2-6-6-2 Mallet along with sound. The Mallet sounds absolutely spot on just like the rest of Bachmann's sound equipped lokies, but the porters have a tendency to to make crackling sounds when multiple sound effects are played together. (Ex: Chuffing, brake squeal, & whistle.) Does anybody know if this is a problem with the sound exciter(s) or should I purchase a DCC system that can toggle the volume settings of my engines? Any replies are much appreciated!

[dutchbuilder]

My experience with the porter is that it sounded like a talking buggy.
I removed the soundcard and build it into a 4-4-0 American with a real speaker and it sounds fine.
Conclusion; it's the sounder that is the problem.

Ton

[Uncle Ankle]

Thanks dutchbuilder! I believed it had to be that sound exciter, to crank so much noise from a dime-sized speaker without an enclosure is pushing the envelope. I'll mess around with the CV's and find a place to install a better speaker (whether it be a tender car or hidden under the frame.)