David Clark Company
Two-Way Communications

Series 6700-M Headsets

Series 6700 Radio Direct headsets provide clear communications and hearing protection for high-noise environments. These headsets connect directly to portable radios with no adapter required. H6700 Series headsets are also Intrinsically Safe (IS) and carry FM Approval for those areas that require Intrinsic Safety ratings, while providing the same rugged durability and comfort afforded by all David Clark Company headsets. Ideal for oil rigs and gas refineries, chemical and paper plants―virtually any potentially explosive industrial or manufacturing environment.

Modular Configurations provide even greater flexibility with headsets utilizing interchangeable communication cords for connection to a wide variety of radios.

WARNING: The Series 6700 is Intrinsically Safe (IS) when connected to an IS approved radio. When connected to an IS approved radio, the resulting IS level is that of the lowest of the two. When connected to a non-IS radio the resulting system is not IS approved.

Modular headsets

Model H6740-M
click to enlarge

Model H6740-M

Behind the Head (BTH) Style
  • Rated Intrinsically Safe with FM Approval (Approved to IS / CSA / ATEX / IECex standards)
  • PTT button conveniently located on headset ear dome
  • Behind-the Head, dual ear style
  • Undercut, Comfort-Gel ear seals for maximum comfort
  • Quality components and rugged construction
  • Part Number: 40416G-58

Also available: U6710 inline PTT body switch, see 'Modular' tab at bottom of selector guide page.

Parts List

6700 En Espanol
6700 Series Radio Direct Intrinsically Safe
Noise Attenuation Data
23 dB
Frequency (Hz) 125 250 500 1000 2000 3150 4000 6300 8000
Attenuation (dB) 14.1 21.9 29.4 32.0 29.7 35.2 36.2 38.1 37.4
Standard Deviation 2.5 2.5 3.0 2.7 2.2 1.7 2.5 2.9 2.8