The 61 is probally a low-impedance mic (ours were, and our Pumas are), and Bose offers a conversion, but it replaces the cord, mic and the volume control thingy. Super easy to swap but pricey. I used my BOSE for 2 years then went back to a helmet and those cep-usa ear thingys, far quieter IMO, and I'll put a set in an older regular DC for the summer. I never liked the wind noise in either the 61 or the Puma with the Bose ANR, especially with a window open.