MQ 50i is a 2 way compact loudspeaker for indoor wall flush-mounting installation. Its “bass-reflex” (/ vented) cabinet includes a 5 inch woofer and a wave guide loaded dome tweeter (to ensure a sound correct dispersion over a wide coverage angle). It includes a transformer inside for the connection to (100 – 70 V) constant voltage lines, yet it can also be set to 16 ohm (low impedance connection). The power / mode selection is made by means of the front panel rotary switch.