I have a frisby fs-7200uf home theater system i just bought and i get a loud humming from the sub woofer.ive read alot about checking to see if its the cables coming in from cable or other things .my issue is that not hooked up to anything and trying all the plugs in my house the sub woofer still hums....help

See highlighted text. It has an Equaliser
Description

• Bluetooth 2.1 and enhanced bass technology/compatible with all Bluetooth enabled devices.
• USB/SD/MMC memory cards audio inputs.
• Bluetooth wireless range: Approximately 30 ft..
• LCD display (track you're playing or adjust EQ level or volume).

• Imported from USA (Sizes & Specifications are based on the USA Market).

FrisbyFS-5020bt Bluetooth 5.1 Speakers provides clear sound from
all satellite speakers and woofer from up to 30 feet away. You
can sync any Bluetooth enabled device, your phone, tablet, media
player or even your computer. The subwoofer features an LCD
screen that makes it easy to see which track you're playing or
adjust EQ level or volume. Frisby fs-5020bt supports Bluetooth
5.1 Technology for streaming audio wireless from devices that are
Bluetooth-enabled. For other non-Bluetooth devices, there is a
3.5MM auxiliary input ports. Additional conveniences include an
LCD display and included remote control. You've got full power to
fill your room with big, balanced sound. Both speakers and the
subwoofer are magnetically shielded to provide the protection
against image distortion from external electronic sources.
Compatible with all pc models, laptops, smartphones and all mp3
players, iPod, Discmans, Walkman's equipped with headphone jack.
The included remote control has controls for bass and treble EQ, volume, play/pause, previous/next track, Bluetooth sync and
power. The speaker also has an LCD display and volume/sync
buttons.

You can't reset the Bluetooth device, you remove the connections from the devices connected to it, smartphone televisions etc. On the device click the Frisby and then click 'Forget Device'. To reset a remote, you just remove the batteries for a while.

Unfortunately, I don't think you can connect this sub-woofer without the rest of the components of the HTS3440/37 DVD Home Theater System or a related Philips home theater system. The speakers in the system are hard-wired with a colored plug that you connect to the sub-woofer. Then you need connect the inter-connect cable between the sub-woofer to the DVD Player of the system. See the wiring guide in the Quick Start Manual or the User Guide available on the product support page: https://www.usa.philips.com/c-p/HTS3440_37/divx-ultra/support .

Sub-woofers that aren't part of a home theater system connect to a receiver with a digital audio RCA cable. One example is here: https://www.amazon.com/Mediabridge-ULTRA-Subwoofer-Cable-Feet/dp/B003FVYXY0 . Then the speakers also connect to the receiver.

Even if you find another Philips Home Theater system that is missing the sub-woofer, I wouldn't rule out a change in the pin arrangement for the inter-connect cable that would cause the system to fail. I can't find any sources for a replacement inter-connect cable; the part number isn't in the manual that I can find.

I wish that I had better news for you.

Cindy Wells

Yes

Did you connect power to the sub-woofer? Most subs have their own amplifier. Just check if there is also an on / off switch on the sub.

Have you checked the volume control thoroughly? Because some sound system has independent volume control for each speak.

Also check the setting very well maybe it has been tampered with.

I also just hope nothing is wrong with the sound IC.

Try these first and lets see what happens.

take care.

the conections some where are dirty you need to unplug everything clean all connections and the hum will go away

On the remote control for the Samsung Home Theater System look at the bottom left to a button that says "MODE", those moods change the sound each speaker gives off. if that doesn't work, you might need new wiring because there are other wires that are more durable than the ones that come with it, much better too.

the reciever should have a "subwoofer level" setting, or a "bass level control" If you cannot find this then try to place the "sub-woofer" away from walls and elevate it from the floor. This will reduce it's loudness/ intensity at annoying frequencies...

Good Luck

often your sub need to be change because of its malefunction.