Question about Behringer Ultratone K3000fx 300w Keyboard Amplifier New
Step 1:Hate to say it, but possibly a blown speaker. To check this, do the following -
Step 2:Insert headphones into jack to verify for sound there.
Step 3:Unplug unit and open rear panel to reveal speakers.
Step 4:Remove leads from woofer.
Step 5:Using a multimeter, set to OHM (horseshoe) to lowest setting.
Step 6:Apply red(+) and black(-) to speaker leads. Meter should read at least 4-8 ohms of resistance.
Step 7:If no reading, then voice coil is blown.
Step 8:If no meter available to use, the use a 9 volt battery by applying direct connection to speaker leads in an off-and-on fashion - You should hear a "click" sound come from speaker. If no "click," then speaker is blown.
Step 9:If click is heard, and resistance on meter is correct, then the amp circuitry leading to the woofer may be blown = repair needed.
Posted on Jan 26, 2013
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Posted on Jan 02, 2017
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