Question about Myron & Davis AD212

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My sound get distorted after about 20 min.of playing static i have adh7dvd on headrest.help ronnie

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  • ronnielois Jul 18, 2009

    headrest dvd ahdm7r wear is av. output located at.what is a avo99 were does it plug in to.problem stadic comeing from wireless mod.

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Sound like you are experiencing interference, please describe your exact setup so we can help more.

Thanks

Tim

Posted on Jul 18, 2009

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Hi there,

Problem seems in the sound IC...(amplifier) of your Myron AD212.
Try plunging a external amplifier ...

Post back with results....

Thanks

Posted on Jul 18, 2009

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1 Answer

After 90 minutes or so of perfect play back... the picture became very distorted (static) and lost the sound completely. I manually cleaned the head. Distortion is less, sound still out.


hi,
please try to clean the cassette tap running path like capstan motor shaft and the inclined posts and the pressure roller Etc, check the roller for loose if any.

Feb 18, 2016 | Sony Handycam CCD-TRV40 Camcorder

1 Answer

How many total watts does this system have


Well... It consumes 240 watts of electrical power total so take the audio power specifications with a huge grain of salt, as no audio device puts out in audio power anywhere near what it consumes in electrical power. Heat produced is power consumed, too and nothing is 100% efficient.

In the specs below the only information useful for comparison is in the line I highlighted with >>> <<<<'s as it conforms the closest to the industry standard practice of using:

"X watts into 8 ohms (standard load) from 20 - 20000 hz plus or minus Y db at no more than .0Z% distortion"

The better amps specify vanishingly low distortion specs (0.0x% vs 0.x%) at the cost of being able to claim higher wattage. But they guarantee cleaner sound at the claimed levels.

JVC is being tricky with their choice of a 40 hz lower limit. THAT is the power hungry end of the spectrum. 20 hz is normally the lower limit stated.

"Output Power .............At Stereo operation
Front channels .............55 watts per channel, min. RMS, driven into 4 ohms at 1 kHz, with no more than 0.9 % total harmonic distortion. (IEC268-3/DIN) 30 watts per channel, min. RMS, driven into 8 ohms at 1 kHz, with no more than 0.9 % total harmonic distortion. (IEC268-3/DIN)

>>>>> 30 watts per channel, min. RMS, driven into 8 ohms, 40 Hz to 20 kHz, with no more than 0.8 % total harmonic distortion. <<<<<

At Surround operation
Front channels .............50 watts per channel, min. RMS, driven into 8 ohms at 1 kHz, with no more than 0.8 % total harmonic distortion.

Center channel .............50 watts, min. RMS, driven into 8 ohms at 1 kHz, with no more than 0.8 % total harmonic distortion.

Rear channel .................50 watts, min. RMS, driven into 8 ohms at 1kHz, with no more than 0.8 % total harmonic distortion."

Mar 02, 2010 | JVC RX-554V Receiver

1 Answer

Extreme distortion/static in music.


you might have blown your speakers. Thats what it sounds like, if it got loud with a lot of low-end then it got all staticy and distorted, you fried teh speakers.

May 27, 2009 | Phase Linear PLC 400

1 Answer

Webcam audio problem


Normal 0 Two things can cause static.
First, If you have your speakers turned up to high it will give you feedback causing distortion and static. I recommend using a headset when videoing.
Second reason is, if you are using a laptop and have added an external microphone and have a built-in mike, between the two it will cause distortion and static.
Not knowing the configuration of your computer makes it harder to analyze the problem.
So hope this is of some help. Bud


Mar 23, 2009 | Microsoft Lifecam 6000 Webcam

1 Answer

Playback distortion


Normal 0 Two things can cause static.
First, If you have your speakers turned up to high it will give you feedback causing distortion and static. I recommend using a headset when videoing.
Second reason is, if you are using a laptop and have added an external microphone between the two it will cause distortion and static.
Not knowing the configuration of your computer makes it harder to analyze the problem.
So hope this is of some help. Bud

Jan 09, 2009 | Logitech QuickCam Communicate STX Personal...

1 Answer

Vr-309 starts to clip after 10-15 min


This is a case of one or more transistors breaking down when heated. This can be found usually by using freeze spray to cool down one transistor at a time until the problem clears up. You can narrow this down a bit by determining whether this "noise" is effecgted by the volume control or not. Also, does the problem show up faster when the unit plays louder?

Dan

Aug 29, 2008 | Kenwood VR-309

1 Answer

Logitech Communicate STX videos plays back static!


Normal 0 Two things can cause static.
First, If you have your speakers turned up to high it will give you feedback causing distortion and static. I recommend using a headset when videoing.
Second reason is, if you are using a laptop and have added an external microphone between the two it will cause distortion and static.
Not knowing the configuration of your computer makes it harder to analyze the problem.
So hope this is of some help. Bud

May 22, 2008 | Logitech QuickCam Communicate STX Personal...

1 Answer

Recorded Video Plays back static


Normal 0 Two things can cause static.
First, If you have your speakers turned up to high it will give you feedback causing distortion and static. I recommend using a headset when videoing.
Second reason is, if you are using a laptop and have added an external microphone between the two it will cause distortion and static.
Not knowing the configuration of your computer makes it harder to analyze the problem.
So hope this is of some help. Bud

May 15, 2008 | Logitech QuickCam Communicate STX Personal...

1 Answer

I use a tascam dm24. i am getting drop out when my music is playing. i also get a static sound sometimes after drop out.


ok question when you play music is off cd or comp. or mp3 player
reason i ask is cause some cd formats and songs come with the distortion on them the manufacture does not see this cause mass production in cd's
turn onto a receiver fm tuner if static is still there power failure is common in the power house inside receiver these require maintenance and probably new power house conductor

dust in the system can create static also hair and dust are magnatized this can distort the sound quality professional cleaning of system is probably needed in this case

May 12, 2008 | Audio Players & Recorders

1 Answer

Sound Problem


There's a possibility that you may be experiencing problems with the audio output IC -IC404 - All serial numbers produced until July 2003 might use one of these defective IC's. So if your set was manufactured before this date, that is probably the culprit. If not, and you have it connected to a cable box that has its own volume control, it could be that its volume is turned down and by turning up the TV's volume too high that you are getting this distortion. Hope that helps.

Jan 20, 2007 | Sony FD Trinitron WEGA KV-20FS100 20" TV

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