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ACX-1 ACX-2
ACX-11 ACX-22
Recommended accessories
Replaceable gel ear cushions (Cat. No. 83140)
BP-03 battery pack (except for HMEC 302, HMEC 305 and HMEC 306)
Battery pack with XLR-3 socket for powering the NoiseGard™ electronics of the HMEC 300,
HMEC 305-C, HMEC 322, HMEC 400 and HMDC 322 headsets. Four 1.5 V AA size
alkaline manganese batteries (IEC LR 6) ensure approx. 15 hours of reliable operation
(batteries are not included in the delivery). Length of connecting cable: 0.9 m.
Adapter cables (except for HMEC 302, HMEC 305 and HMEC 306)
Sennheiser offers special adapter cables for connecting the NoiseGard™ electronics of the
HMEC 300, HMEC 305-C, HMEC 322, HMEC 400 and HMDC 322 headsets
to the on-
board power supply via the cigarette lighter socket:
• ACX-1 adapter cable for powering one headset via the cigarette lighter socket
• ACX-2 adapter cable for powering two headsets via the cigarette lighter socket
The adapter cables are also available with a right-angled jack plug featuring a 7.5 A fuse
and a green LED operation indicator:
• ACX-11 adapter cable for powering one headset via the cigarette lighter socket
• ACX-22 adapter cable for powering two headsets via the cigarette lighter socket