On 3 May 2006 05:06:00 -0700, "Mungo" wrote:

[Apologies for cross-posting to uk.d-i-y but I was advised that there's
a wealth of
good people there even though this is an Audio question]

Our local junior ice hockey club wants to announce various messages to
the gathering masses (all three of them at most games!).
I've already plumbed my old laptop in to the Public Address system so
we can play appropriate music at the game stoppages.

So now my idea is to get a wireless radio microphone of some reasonable
quality to feed in to the microphone input of the laptop and thence on
out the headphone socket and through the PA (we need wireless because
the timekeeper's bench and the DJ area are some 50metres apart).
Plumbing through the laptop to use its mixing capabilities.

Don't mix through the laptop. Buy a little Behringer mixer and use
that. The price is so low it's a no-brainer.