Posted for bob mackey <n103md@yahoo.com>:

 I am considering a radio upgrade in my 235/320. Not having acres of
  panel space like a Lancair IV, I am looking for small, lightweight
  configurations. One possiblity is to use the Garmin SL30 Nav/Com
  which includes a built-in 2-place intercom. Having only two seats,
  and no room for more, that seems like it might suffice while also
  allowing me to listen to the standy frequency, and monitor the radial
  from the standby VOR. It all sounds pretty slick...
  
  But - will I be happy with the intercom's performance?
  Or will I want a separate audio panel anyway?
  The intercom does not have dedicated knobs, but instead requires twisting
  and selecting menu items to adjust volume or squelch.
  Does the SL30 have non-muting inputs for alarms or annunciators?
  If anyone is using an SL30 and its integrated intercom, I'd like to hear
  about your results.
  
  -bob mackey
   bob  (AT)   pure-flight.com