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Panasonic Home theater system sa-ht700 came with the sb-wa340 (subwoof/speaker portal) that emits a Super loud (deafening) squeal ocaisionally. It will happen when watching TV or a DVD . It stops only by turning it off, and then back on. Sometimes, very soon after turning back on, it will happen again. It's the only problem with the system, but it's a biggy... Please Help!

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There are so many reasons of the issue you have described which are as under--
Custom Sound Memory – Store the sound settings: DVD-A] [DVD-V] [VCD] [CD]
Store the sound settings for a disc so the unit recalls them the next time you play it. Make the settings. Press and hold [C.S.M]. Discs recorded with 2-channel LPCM at 44.1 kHz or 48 kHz This feature gives you a more natural sound by adding the higher frequency signals not recorded on the disc.
[WMA] [MP3]: Discs recorded at 44.1 kHz or 48 kHz. This feature reproduces the frequencies lost during recording to give you a sound closer to the original.
Double Re-Master – Enjoying natural sound: During play press [DISPLAY] until the unit information screen is displayed then press <, > to select the audio menu. Then press <, > to select “Double Re-master”. Then press <, >
This doesn’t work if input is “DIGITAL IN”.
DR COMP – Dynamic range compression: Change this setting to listen to a source recorded with Dolby Digital when “DIGITAL IN” is selected as the source at low volume (such as late at night) and maintain audio clarity. This setting reduces the peak level in loud scenes without affecting the sound field. Press [SHIFT]i[DR COMP].
Each time you press the button:
STANDARD: The level recommended by the producer of the source for household viewing. MAX: The maximum allowable compression (recommended for night viewing). OFF: Source is played with the original dynamic range (factory setting).
Changing the delay time (Speaker Setting): (Dolby Digital, center and surround speakers only) For optimum listening with 5.1-channel sound, all the speakers, except for the subwoofer, should be the same distance from the seating position. If you have to place the center or surround speakers closer to the seating position, adjust the delay time to make up for the difference.
Press <, > to select the delay time box and press [ENTER]. Press <, > to adjust the delay time and press ENTER. Check the connections. ≥Turn the volume up. ≥Turn muting off.
≥Switch off the unit, determine and correct the cause, then switch the unit on.
The main causes include:
–Shorting (bare wires touching) of positive and negative speaker wires.
–Using speakers with an impedance lower than that rated for this unit.
–Straining of the speakers through excessive volume or power.
–Using the unit in a hot environment without proper ventilation
≥Adjust the position of the FM or AM antenna.
≥Use an outdoor antenna

Please do accept this solution and revert for further assistance.


Posted on May 12, 2009


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