Subwoofer makes boom sound.

Jan 18, 2019
4
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10
I have Harman kardon AVR 142 with HKTS210USB/230 subwoofer. Whenever i switch channels or stop playing music and start again a big boom sound coming from Sub woofer. What could be the problem ?
 
Jan 18, 2019
4
0
10


How to disable it ? i couldn't find it on sub woofer. The subwoofer having following switches,
Phase Switch Theres is 2 option. Reverse and Normal( i put "reverse")
Bass Boost Switch (off)
Power On Mode Switch. Auto / On (On)
Subwoofer Level Control
Input Mode Switch Normal / LFE (Normal). If i choose LFE the boom sound coming more loudly.
External Trigger Input Connector
Line-Level LFE In Connector Line-Level L/R In Connector (Connected cable from AVR to LFE port)