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The sub-woofer isn't connected to the wiring harness of the KDC-400U. It has to be wired separately. Then the sub-woofer input gets connected to the KDC-400U sub-woofer out using R/L audio wires as show on page 13 of the Quick Start Guide. The direct link to the Quick Start Guide is http://manual.kenwood.com/files/4fd9a24acb9fa.pdf . You may be able to use the wiring information on pages 12-13 to help you determine which wires aren't going to the sub-woofer.
If you have an ohm meter (resistance) test for 7-8 ohms across each set of speaker leads to your sub woofer. Its likely you have blown speaker (load is causing amplifier to draw to much current) or just a bad amplifier in the sub (likely not worth $ repairing vs new). To test the sub woofer speaker itself you may have to take it apart to test its resistance.
Sub-Woofer pre out is for connecting that terminal to the input terminal of any sub-woofer. The sub woofer which it should be connected must be an active type [that is, there must be independent amplifier section built it with that sub-woofer; not mearly a crossover network].
hi,
You can't connect the pre out of your AVR to this sub woofer. Do one thing connect the frond left/ right channel speaker "B" out of harman kardon to the sub woofers left right speaker in put. you can connect the speaker out "A" to your normal left right speakers. Remember to switch Speaker "A" and "B" in ON position in your AVR. Also do one thing go to the speaker setup of AVR and switch OFF (slelect NONE) the sub woofer.This will disconnect the sub woofer pre our and the sub frequency will mix with frond left right channels.
ok
It sounds like you have switched off the sub channel.
Keeping pressing C Level on the remote till you see SWFR.
Press D l / h to adjust the speaker output
level.
You need to take apart tthe sub woofer and check the connection to bass speaker for continuity. It sounds like an internal broken connection to speaker on sub woofer unit.
try unpluging everything apart from the headset in the aux input (make sure you plug in to the white and red NOT BLACK) Sub woofer and power cord. Also make sure the power is on the the sub woofer. rx7pat
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