My first Head-Fi review. Pledged for these on Kickstarter this year. I own full range electrostatic speakers (Acoustat 3) and electret headphones (Audio Technica AT706).   The Mitchell & Johnson GL2SE use a dynamic low frequency driver and a electret midrange/ high frequency driver. They have a 2 way crossover built in like a home loudspeaker. Normally electret and electrostatic speakers need special adapter boxes or amps to function. The M&J GL2SE have permanently biased electret panels with matching transformers built into each ear cup. You can...