The HEB mics are basically just a matched pair of DPA 4061's (or 4060's) with a special plug that fits into the Coresound battery box. A number of people on taperssection run 4061's or 4060's terminated with a 1/8 plug and powered by a Church Audio ST-9100. I made my first recording with 4060's a few weeks ago powered that way and it worked great. Best sounding recording I've made in 10 years of taping. A 9 volt battery box should work just as well if you don't need the preamp's gain. You should be fine replacing the HEB's plug with a 1/8 plug.