EM Acoustics X3-DFSP self-powered downfill element User Manual
Page 14
Page 14 of 36
X3-SP User Manual
v1.0 May 2012
4.5 – The Drive Unit Test System
Incorporated into both the X3-SP and the X3-DFSP is a complete test system to give the
user the electrical status of all drive units within the enclosure.
Pressing the “test” button will engage a set of relay switches, which disconnect the drive
units from the amplifier feeds and instead connect them to the 9V battery powering the
test system. A green LED will light on the graphical representation of the front of the
loudspeaker for every drive unit with a complete electrical circuit. The “Battery OK” green
LED will also light.
Assuming the battery LED lights (if it doesn’t, replace the battery with a 9V PP3 type
battery), any LED’s not lit indicate an electrical issue with the associated drive unit. Check
the internal connections and if necessary replace the drive unit in question.