Can I use in-ear speakers?

Yes, in fact Autocom has headset leads and helmet "looms" specifically designed to accommodate in-ear (monitor) speakers, which can be used use with current as well as older systems.

Please refer to the new part 2091 (see diagram below).  These Headset looms work the same as Autocom's standard helmet headsets, except they have a 3.5mm jack on the lead that enables the Rider or Pillion to plug in their "In-Ear" speakers.