The Apart EN-SPH6T20-W is a 6.5-inch sphere loudspeaker with ABS housing (RAL 9016 equivalent), equipped with a high efficiency full range speaker and a multi tap 100 volt transformer, all certified according EN 54-24. The unit has a ceramic speaker line connector block, thermal fuse and a power selector switch at the top of the speaker. The unit can be used as a low impedance speaker by setting the power selector switch to the 8 ohms position in this position the speaker delivers a power of 20 watts.