External Speaker for Cisco 7937 Conference Phone of 7945G?

We recently had a conference call to a large room. The audio coming out of the 7937 was just barely loud enough. Has anyone been able to find a good means of further amplifying a Cisco call to be able to present to a larger group?
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amigan_99Network EngineerAsked:
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agonza07Commented:
Go with the dual 8831 set up. Works great

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amigan_99Network EngineerAuthor Commented:
k - thanks.
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