It'll probably perform pretty badly until it warms up. When your hot breath hits the cold reeds, moisture from your breath will condense on the reeds, making them wet, sluggish, and perhaps completely unresponsive.
This is why Robert Bonfiglio warms his harps with a small electric blanket or heating pad before he performs. You want the reeds to be as warm as your breath to prevent condensation.
Visit my harmonica website www.Hands-Free-Chromatic.7p.com Vern
If you perform with a tube amp, laying the harps on top of the amp will probably do the job.
Thanks, Richard Hunter hunterharp.com latest mp3s always at http://broadjam.com/rhunter
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