Question about JBL Cinema SB100

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Digital output to led tv has no sound

Plugged jbl cinema sb 100 digital input connector to hisense k360 tv and we get no sound

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4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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lil_smurf
  • 7 Answers

SOURCE: JBL Media 100 Speaker power?

Buy a power adapter from radio shack or similar place. You need a 1000mA 12 volt dapter. Just make sure it is rated @ or above 1000mA to avoid the adapter heating up and possibly burning. The whole setup is rated @ 850mA wich 1A(1000mA) should handle with enough head room. But it might run you about $15-20. I would just buy a cheap radio with rca inputs/aux input and use that. I got one from Walmart for around $40 and it plays CD's & AM/FM.

Posted on Jun 09, 2009

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dunnbiker
  • 8546 Answers

SOURCE: JBL d110 /w no sound output

There is a standby indication that activates after 10-15 minutes without any input signal. I suspect that might be what the red light is telling you - no signal.

Loud hum from a loosened cable is normal as hum usually means there's an ungrounded connection somewhere acting as an antenna and the amp is doing its job to amplify what it thinks is a signal, in this case 60hz stray ac current is being sensed nearby. It's a good sign that you get hum from the sub because that means the amp is alive.

Avoid manipulating cable connections with the Sub or Receiver turned on as you could introduce a static spike that could harm any connected equipment.

Are you certain a bass signal is making it into the sub? The complexities of modern AV receivers vary in how you configure them to direct LFE to a sub. Bone up on that end of the chain.

Or, just hang a CD player on the Inputs of the sub and play something with a reassonable amount of Low Frequencies.

>>>> Be advised that this way of testing has NO VOLUME CONTROL because amps without volume controls always operate at maximum gain, relying on your external controls to attentuate it (hence, the loud hum from a loose cable); so choose a track that eases into the loud parts with some quiet parts up front and BE READY TO PAUSE THE PROGRAM AT ANY SIGNS OF STRESS. <<<<

A living sub will produce only muffled rumble in the absence of other speakers producing the higher frequencies which carry the intelligence of the signal. If that works, back to the receiver for settings. If not... sigh.

-----

For hum problems, even those you cause yourself:

Disconnect all inputs to see if that helps. If it goes away start with the signal cables and add in things until it comes back.

Sometimes the reversing the orientation of the AC plug can help with hum. Or it could be something like a loose or high resistance connection internal to the sub. Good luck.

Posted on Nov 30, 2009

snowghost1
  • 784 Answers

SOURCE: I have a JBL TLX

sounds like you have check just about everything -- but since it is a JBL speaker it is worth taking into a re-coning shop and have them take a look at the speaker itself,, it sounds like you might have a bad speaker coil and you are getting cross-over interference. they will be able to tell you for sure in about 3 minutes after putting a meter on the unit,, and the cost will be very reasonable.
here is a phone number to a speaker repair shop in Dallas, give them a call and have them look at your speaker ( 214 ) 324-1132 - Freeman-Tuell speaker repair.


c...

Posted on Feb 11, 2011

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