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| The second thing we did was redesign the {{L1}} software so that it could "filter out" the effects of momentary crosstalk and not cause the problem. That way future L1's would not have the issue. | | The second thing we did was redesign the {{L1}} software so that it could "filter out" the effects of momentary crosstalk and not cause the problem. That way future L1's would not have the issue. |
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| === Intermittent Drop Outs Using the {{T1}} and Model II === | | === Intermittent Drop Outs Using the {{T1}} and {{Model II}} === |
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| The user manual states 5 amps or greater, so six amps is a good approximation. For that reason, we recommend only up to two L1 MII’s on a single 15A circuit breaker in the US. | | The user manual states 5 amps or greater, so six amps is a good approximation. For that reason, we recommend only up to two {{Model II}}s on a single 15A circuit breaker in the US. |
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| | | {{L1 Model II with T1 Sound Drop Outs}} |
| A quick review of three POSSIBLE causes of audio cutting out follows. That will help us determine what is going on.
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| 1. If there is a non-Bose B1/B2 cable, OR if the B1/B2 cable has a defective, loose connection, audio can intermittently mute. It may happen with loud music because the speaker will be vibrating and shake the loose connection. This will sound like a clean muting of all audio for a second or so. There will be no visual indication.
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| Fixable by tightening the screws in the connector.
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| This would only happen on one L1 MII at a time. If two dropped out, this is not the issue.
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| 2. Very low, out-of spec, AC power (less than ~105 VAC on a 120V system, or less than around ~215 V on a 230 V system. The manual states 110 and 220 for good measure) coupled with high signal level. This can be caused by a low power source, or one where the outlets are a very long distance from the electrical panel, extra equipment on the same electrical branch, power sags or dropouts, long or multiple extension cords, or small gauge extension cords.
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| In this case loud music increases the current draw, and the voltage drop over the extension cord will lower the voltage enough to cause a reset of the T1, or the L1 MII base.
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| If the T1 resets, the LED’s (input trim level, mute LEDs) will turn off. The LCD display will remain blue, but be blank until the unit restarts.
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| The L1 MII base can reset but it does not show on the indicators.
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| In either case the answer is to ensure the power supply is solid, and dedicated to the audio equipment, and to have as short cords as possible with large wires.
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| Also be aware that separate wall outlets may still be on the same breaker.
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| If there are intermittent voltage sags or outages in your area (as there are in parts of Florida, for example), it is possible that some equipment that does not use a lot of power (like mixers) will continue to operate, and equipment requiring high power, like amplifiers, may not be able to produce audio.
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| Those outages can happen any time, but are less likely to repeat, or unlikely to happen only at loud parts of the music.
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| 3. Defective units: If the first two are not the cause, then either the T1 or base unit may be defective, and you should contact customer service.
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| I hope this helps.
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| Bill-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/867107664/m/9390020876?r=7270097876#7270097876 What could cause sound drop outs]
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