Showcomms IFB Earpiece kit for  theatre intercom system beltpacks and the Reidel Bolero with a socket for an XLR4F (listen only).

Superlux HMD685A single sided Headset with Dynamic Cardiod Mic.
Nice thick downlead cable of 1.5m length terminated with a XLR4F connector.
400 ohm Speaker Driver.
40mm Neodymium.
90 dB SPL (1mW).
Frequency respons…

Eartec MAX4G single sided headset. Light weight /medium weight headset Left or Right ear worn.  The mic boom arm can be swivelled through 270 degree.
When the mic boom arm is set to pointing vertically upwards in alignment…