FWIW,
The Century Club II separate sale PT tender was the ONLY Lionel product which included 4 speakers! (FOUR 32 Ohm Baby Fat Boy speakers)
Sound performance matches that of tenders with a regular 2" Fat Boy speaker, so there was no particular advantage, aside from the fact that you may be one of the lucky owners of the only Lionel product to include FOUR speakers! (that's all I can contribute to this thread!)
Thank you,
Mike