Where can I find an amplifier for the Lennox LN-7 surround sound system

Is the microphone live? If so, what you're getting is called "acoustic feedback". Any room sound gets in the mic, gets amplified, comes out the speakers, and then gets picked up by the mic again. Louder and louder until you get to the maximum your system can do.

The solution is to turn it down. . . until it stops.

The output device is not capable of providing audio through the HDMI.
It lacks the internal hardware.
If Yor trying to output the HDMI Audio from the ln-70 then the input device is incapable.

How do set up my lennox ln-7 audio system

Connect the surround sound to cable box or use a optical wire

Hi,
Need to know how to set up a surround sound system? It's fairly easy, with the right equipment. Surround sound gives you that "theater" feel in your own home.
For more information on optimizing the sound of your chosen system visit:
http://www.ehow.com/how_3393_set-surround-sound.html.
To set up a surround sound system go to:
http://forum.ecoustics.com/bbs/messages/34579/219978.html.

Additionally,Some people prefers a wire diagram to connect their surround sound system. The basic concept to connect any audio system is to follow the path of sound from its origin to its final output stage, either headphones or speakers. There are other basic premises to follow, such as the impedance of the speakers and the output of the amplifier, but the concept is to start with an input and terminate each input to an output somewhere on the amplifier unit.
A wire diagram shows a picture that represents where each of these wires would go in considerably little detail. One example would be that a television set starts with a signal from somewhere, broadcast or cable, and comes out of that antenna and goes into the surround sound amplifier. The sound is processed in some way and the video is output to the television set and the audio is output to the speakers or headphones. Although complicated in textual from, most find that a wire diagram is much easier to follow.
For an example of a wire diagram for a surround sound system visit ..

http://www.crutchfield.com/.

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Hope this helps!

Hi, It all depends on the system you are using. Most sound systems sub woofers comes with in built Amplifier, So if the system your using does not have amplifier to amplify and make the sound system sound better,That means, you will have to get a receiver for your system for great performance.

Hope that helps.

Thanks for using fixya....

there will be a subwoofer pre out( needs to be amplified) or if it don't have subwoofer pre out you will have to send the audio out to a stereo reciever that has inputs for the optical ( digital audio signal )( to a stereo or surround system that has 5.1 or higher has full surround sound ) and of course L and R audio inputs and the subwoofer pre out , then the subwoofer pre out will have to be amplified by a reciever , subwoofer amp , surround sound , ect

Center channel will not work unless unit is set for Surround or Pro Logic. Make sure center channel's volume is up

The power amp does need an imput signal ie. tuner, cd , and such to play. You can use the power amp with the other equipment.
Good Luck
BIG RED

It must be about the sound quality need of your amplifier. The sound processor simply needs to get clear signals from sources such as fm/am receiver, dvd/cd players etc. in order to manage'em to give you the optimum surround sound. If the fm receiver has an "FM MUTE" option, I recommend that you turn it on. By doing so, you'll receive only good quality fm stations, furthermore your amplifier will let you get surround sound. The second issue you mentioned has its own answer inside. Use a "new" cd player, you can get optical cables, digital coax cables to improve the performance if you like..