Subwoofer problem

mightyatoms

Dont know why today my subwoofer has "num num" sound suddenly....
I tried to connect the spade tail attached on the subwoofer cable with metal chassis of subwoofer, but the "num num" sound is still here....

Any ching has such problem before??

djaddy

pls check the connection of your rca cable.

cmsjkung

Try to use different power cable.... Sub woofer produce noise usually due to power cable and power adapter...

bembem

Is power problem, may be change another power cord to test

LauChungChung

可能係grounding問題
試下off左 subwoofer的GND，或者諗緊甩走Powercord的水線

如果唔係GND問題，咁有機會係RCA Short short地...

mightyatoms

pls check the connection of your rca cable.
djaddy 發表於 2009-11-1 22:41

You mean the subwoofer cable?

mightyatoms

I tried to use another cable... but still have the problem until....
I plug it into my Belkin AV powerbar... then the num num sound is gone.....

Before today, that was no problem... Why it is happening now suddenly??

csum123

Have you just brought any new electronice appliance for your home when you heard the sound of  "num num" ?

mightyatoms

Have you just brought any new electronice appliance for your home when you heard the sound of  "num num" ?
csum123 發表於 2009-11-1 23:36

I finally found out the problem...
csum123 hing, you are so pro!!!
whenever I connect the power cord or RCA with DAC, no matter my subwoofer plug is on wall socket or powerbar, "num num" sound appears.....
So now i unplug DAC (either power cord or RCA) when i didnt use it.... the subwoofer is fine now....

But how can I fix this problem ultimately (DAC & subwoofer can be used together)??

mightyatoms

I found that if I unplug the rca connection between RCA & amp, the num num sound will be gone too...
So any ching know how to solve the problem?
I dont want to unplug the rca from DAC when I use the subwoofer all the time.