Spurgeon preaching outdoors at the famous Crystal Palace, October 7, 1857 to over 24,000 souls. Remember he preached without any electrical or mechanical means of amplification of his voice. His voice was described as being, strong, clear, bell-like, with could be heard by an audience of many, many thousands. He spoke at the rate of 140 words per minute. 20 more than an average speaker.
A bitter critic of C.H. Spurgeon described his preaching in a newspaper article on January 25, 1855 thusly: "The laws of oratory have been well studied and he suits the action to his words. This mode of public speaking was, in the theatres of ancient Greece carried to such an extent that one person had to speak the words and another had to perform the gestures and suit with every variety of face and form the movement of the subject in hand. Mr Spurgeon has caught the idea, only with this difference, that he performs both parts himself. (Spurgeon originated the illustrated sermon without special effects)
Sheridan Knowles, the famous 19th Century actor and playwright said to his students; "Go and hear Spurgeon at once! His acting is absolutely perfect! He has nothing to learn from me or anyone else.