Excellent audio. However, this is not the real voice of Swami Vivekananda. So you know (and I actually went in person to the Vedanta Society of Hollywood and asked, even to the Swami in charge, and they also called the New York branch to confirm!), there is not a single video or audio recording of the Great Master (otherwise it would be in their cathalog or at least in their archives). The voice you hear in this audio belongs to Subir Ghosh. This and more audios on Swami Vivekananda with Subir Ghosh voice can be found at www hamaracd com (don't forget the periods). Then, on the left navigational pane, click on "Historical Recordings". After the page refreshes with the selection, scroll down to the very bottom center of the page, to the last line of text, and you will find "Click here to get the memorable speech in Subir Ghosh's Voice English Version..." and there you have it.
I don't think is Amazon's fault that this audio is being advertised as the real voice of Swami Vivekananda. It seems that an outside vendor is at fault.
HamaraCD link has change: www and hamaracd and com / hcdindia / index and asp (don't forget to remove the spaces and replacing "and" with a period.
If you still cannot get there, then google "hamarcd" and on their web site, at the right uppter corner, the blue square box/section, where it reads "To compile your own cd click here for" click anywhere on the blinking text withing that section which reads "Deliveries in India / Deliveries outside of India". Then, after you get the next page, follow the instructions I gave above (before this update).