For sale: PreSonus Central Station. No crackling, and in good working order. I've taken good care of it, but I no longer use it as I've consolidated my monitoring setup to a single system. I believe it's still an excellent controller for those who want to switch between multiple monitors or manage their production environment stably. * The power adapter is not the original, but it has worked without any issues during normal use. * I have never used the talkback function, so its operation is unconfirmed. * For safety during shipping, all Trims will be set to minimum (fully down). Please consider this only if you understand the above. For those using multiple monitor speakers, or those who want to upgrade their production environment, how about it? Also, due to the year-end and New Year holidays, it may take a little longer to ship. Thank you for your understanding in advance.