60
Test Procedures
3. Transducer Phase Test
3.1 Apply a DC voltage of 20V, positive
applied to the positive tab of the dual
banana jack on the bass module test cable
and negative applied to negative (gnd) tab.
3.2 Note that all driver cones move outward
when the DC voltage is applied.
3.3 Rewire any incorrectly connected trans-
ducers.
4. System Sweep Test
4.1 Set up the bass module as shown on the
previous page.
4.2 Apply a 40 Hz, 14 Vrms sine wave to the
Neutrik
®
Speakon
®
input connector.
4.3 While listening to the output of the
system, sweep the input frequency slowly
from 40 Hz to 200 Hz.
Note: The whooshing noise from the port
around 45 Hz is acceptable.
4.4 Listen carefully for any extraneous
noises such as buzzing and ticking.
5. Input Panel EQ Switch Test
5.1 Insert a Neutrik connector which can
access pin 2+ and 2- of the connector. Verify
the correct resistance (+/-5%) for each bass
setting of the EQ switch.
5.2 The minus (-) setting = 1.6 kohms
+/- 1%.
5.3 The plus (+) setting = 3.0 kohms +/- 1%.
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