Question about Jensen JP1500 Main / Stereo Speaker

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Receiver I recently purchased a new receiver because the old one -- not that old -- would turn off when I played the CD's loud. Now, within a couple of minutes, the new receiver is also turning off. I have replaced the speaker wires with the best, and don't know what else I can do. I even had the new receiver checked out -- there is nothing wrong with it. What is the problem?

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Re: receiver

You are over driving both your amp and the speakers.
do y9ou have speakers in parallel-- making the combined speakers less than 4 homs? also the cd is probably rated with ( i for got he initials it something like CDX whish has a 30 hertz base boom to it this is a good caution to observe becaus you may be overdriving both the speakers doing damage ( this becomes a DC component and is generating a lot of heat energy causing your amp to clip ( overheat) and the speaker to stop in mid stroke causing mechanical damage).

Get a bigger amp. Starts.
Get a balanced System
Go to a rock concert instead.
work at a jet engine factory.
Good luck
Call me im a doctor you will soon need new ear drums.

Posted on Jan 09, 2008

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This sounds like a resistor problem.
Most likely, when it got shipped to you, it jarred the electronics inside.

Now, because there are several resistors inside of it, I don't recommend just trying to replace them yourself.
I would take it to Fry's, Best Buy, or Radio Shack.

They have electronics repair technicians, and they know how to find the bad resistors quite easily with their testing tools.

I say resistors, as opposed to capacitors.
If it was that, the unit would turn on, and then always shut off within a couple of seconds.

I hope this helps you know what is going on, and I hope it gives you some idea as to what to do next.

Good luck to you, and have a good day.

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It's never a good idea to adapt prescribed connectors to bare speaker wire or vice versa.

Speaker Level and Line Level signals are worlds apart and equipment damage may result. Your Denon (model unknown) probably requires a POWERED SUBWOOFER, to which it would provide Line Level LFE from its Pre Out.

Read the manual where it doesn't say to convert a speaker wire to RCA.

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Basically, you have to inform the receiver it HAS a sub, then you define the ability to share bass with it, then you adjust relative loudness with a test tone and you're off. is where I get most of my manuals.

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I have had my subwoofer for 6 years. It has always

One way to check the operation is to connect a source directly to the inputs of the sub.

A CD player will work fine. Connect the out puts of the CD player to the inputs on the sub. Play a CD.

If you get music from the sub, then no problems with sub.

If nothing, sub has problem.

Could be

A Dead amp.

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Velodyne products usually need to be returned to them for service.

Cost is unknown.

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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.

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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.

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