Custom Subwoofer Hum - Blu-ray Forum

CRMA · 07-25-2009, 08:08 PM

My dad built a custom sub for me that was built out of mdf and has a 10 in woofer. It has a low frequency hum and pops turning on. Is it a power issue that can be fixed or is it an amp issue that needs to be replaced? I will answer any questions I can and any input is helpful. Thx for the help guys!!

Big Daddy · 07-25-2009, 08:17 PM

Is it a continous hum or do you only hear it when you turn it on? Do you get the hum when the subwoofer is not connected to the rest of the system?

CRMA · 07-25-2009, 10:21 PM

When it is plugged in. It does not have to be connected to any audio source. When it is in any electrical outlet it will have a low cycle hum and pop (like punch) and quietly continue its hum. thx for the help Big Daddy.

Big Daddy · 07-26-2009, 03:58 AM

There must be a grounding problem. Check all the wiring and read the Ground Hum and Ground Loop Isolators thread. An isolator may help.

07-25-2009, 08:08 PM	#1
CRMA Expert Member Top contributor Member since:Jan 2008 Home Theater Gallery:22 Blu-ray collection:156 Blu-ray reviews: 46 Trading Score:1	Custom Subwoofer Hum My dad built a custom sub for me that was built out of mdf and has a 10 in woofer. It has a low frequency hum and pops turning on. Is it a power issue that can be fixed or is it an amp issue that needs to be replaced? I will answer any questions I can and any input is helpful. Thx for the help guys!!

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07-25-2009, 08:17 PM	#2
Big Daddy Blu-ray Champion Top ranked HT gallery Member since:Jan 2008 Location:Southern California Home Theater Gallery:79 Blu-ray collection:122 Trading Score:1	Is it a continous hum or do you only hear it when you turn it on? Do you get the hum when the subwoofer is not connected to the rest of the system?

07-25-2009, 10:21 PM	#3
CRMA Expert Member Top contributor Member since:Jan 2008 Home Theater Gallery:22 Blu-ray collection:156 Blu-ray reviews: 46 Trading Score:1	When it is plugged in. It does not have to be connected to any audio source. When it is in any electrical outlet it will have a low cycle hum and pop (like punch) and quietly continue its hum. thx for the help Big Daddy.

07-26-2009, 03:58 AM	#4
Big Daddy Blu-ray Champion Top ranked HT gallery Member since:Jan 2008 Location:Southern California Home Theater Gallery:79 Blu-ray collection:122 Trading Score:1	There must be a grounding problem. Check all the wiring and read the Ground Hum and Ground Loop Isolators thread. An isolator may help.

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