[Icom] Comments on HM-46, 75A or 131 Spk/Mics?

[John O. Newell]

Hello all...I need to get a speaker mic for a public service
event this weekend.  Icom lists the HM-46, -75a and -131 for
the T90.  I've never found a speaker mic that I thought had
good receive audio -- usually they seem weak and/or muddy. 
Any comments on any of these three, especially focusing on
the clarity of the receive audio, would be very much
appreciated.

73 and tks
John Newell
KB1FPM