I just tried to do a recording using a Zoom H4N, two Audio Technica ATR-3350 lapel mikes, and two Rode 3.5mm-to-XLR adapters. Set the recorder for four-track recording (two tracks from the built-in mikes, two from the lavs) and they just didn’t work.
The sound levels were nonexistent. Tapping the lapel mikes got me a _little_ boost on their level meters, but that was it.
I managed to get usable tracks with the Zoom’s mikes, but in the future, I’d really like to be able to record with a lapel mike as well as with the on-board mikes.
I’ve also tried using a 3.5mm-to-1.4″ adapter, and again, no signal.