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Re: what is the impedence/signal level at headphone jack?
A headphone jack is normally 16-32 ohms. If you are concerned that overdriving is taking place then turn down the volume level on the device. The connections should be ok. Just take some caution and keep you volume at around 50%-75%. You should be just fine.
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you will have to buy an 1/8" stereo jack to rca plug....insert the headphone jack into the headphone out of laptop and plug in to any input of choice in the back of the receiver (i.e. aux, video in, cd)...play some music or whatever on laptop and turn your reciever to that input....
The Aux audio L/R input jacks are below the On/Off button on the left side of the front of the stereo's main unit. The headphone jack is just below the input jacks. You will probably need an adapter to split the stereo output from the Blackberry (probably a 3.5 mm stereo jack) to the L/R jacks.
It can if your computer has a 3.5mm jack audio imput.
What you need to have on your unit is and audio out socket. But if it doesn't have one you can use the headphone output. Then all you need is a lead. If you have the output sockets you just need a 3.5 jack to two RCA phono plugs one. If not you will need a 3.5 to 3.5 lead.
If using the headphone output, keep the volume low, use the computer recording device to adjust the signal level. NEVER turn the volume up high. Again if you are using the headphone output set tone controls to neutral, otherwise you will have either too much bass or treble on your recordings.
You can use the computer speakers to monitor the sound. Or you can get a headphone adapter plug that will allow to jacks to go into the headphone output of your unit, so you can connect a pair of headphones, but as I said don't mess with the volume control.
The lit indication ("amp bars") proves that the aduio signal is getting through the unit's circuitry @ least to that point; lack of sound @ the spkr & headphones indicates the amplifier portion of the circuitry is either inoperative or disconnected from the load (i.e., either the speakers, or the headphones). A common cause of this type of problem cropping up unexpectedly is the headphone jack itself; in most products of this type, the audio path from the amplifier output to the speaker connection runs through the headphone jack, so the the speakers may be "turned off" when the headphones' plug is inserted into the jack. If the unit's owner uses headphones regularly, the most common problem to be found with the jack is loose solder connections to the printed circuit board's traces from the jacks' lead(s); in units with this problem whose owner's irregularly use the headphones, it's more common to find oxidization of the electrical contacts within the jack itself.
I'm not sure why you are unable to see the usb device, but I am
surprised you are using a speaker level output to connect to it and not
a line level, which is a much smaller signal. I've never heard of an
RCA to USB adapter, but I like the idea if it works. I normaly
just go into the line input jack on the back when using a desktop
computer. Does your laptop have a line input jack? Good
You can use any analog Audio input out of 3 at rear of this system to listen laptop sound. Audio Cord is required to hook up and its look like red-white RCA pins at one end and other end is like headphone stereo jack for laptop. Audio Cord is available at Sony Part Center.
Hope above info will help you.
If you have an line level audio output on the shelf unit, you can as then the other end would connect up to your input to the sound card, if there is only a mic. input and no line input you can get whats called an antenuator, or get another audio sound card for the computer with a line level input jack. Good Luck