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Sound Drop Outs at High Volume: Difference between revisions

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=== Sound Drop Outs at High Volume ===
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{{Classic icon}}
{{Classic icon}}
Sound Drop Outs at High Volume


=== Non-Standard B1 Cables ===
From Bill-at-Bose<ref>[http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/7301030982?r=9831057754#9831057754 Bill-at-Bose talks about volume dropouts]</ref>
From Bill-at-Bose<ref>[http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/7301030982?r=9831057754#9831057754 Bill-at-Bose talks about volume drpouts]</ref>
 
Hilmar and I looked into it further to find the root cause, and found the rather subtle issue that, depending on the wire gauges and how the wires were paired in the cable, loud bass signals (in the speaker pair of wires) in extra long cables could capacitively couple into the sensing pair of wires. When it happened, the {{L1}} "thought" you were changing your {{B1}} configuration and would mute.
Hilmar<ref>Hilmar-at-Bose</ref> and I looked into ''sound dropouts'' further to find the root cause, and found the rather subtle issue that, depending on the wire gauges and how the wires were paired in the cable, loud bass signals (in the speaker pair of wires) in extra long cables could capacitively couple into the sensing pair of wires. When it happened, the {{L1}} "thought" you were changing your {{B1}} configuration and would mute.


So we looked at capacitance per foot with different wire guages, and with twisted vs untwisted pairs in the same cable, and looked at our sensing algorithm, and did two things to solve the problem:
So we looked at capacitance per foot with different wire guages, and with twisted vs untwisted pairs in the same cable, and looked at our sensing algorithm, and did two things to solve the problem:


We had Mark at [http://www.audiopile.net/ Audiopile.net] send us some samples to our new spec, we checked them, and they worked well. This gave a method for our customers who needed a long B1 cable to get [http://www.audiopile.net/products/Speaker_Cables/NL-4_speaker_cable/NL413_cutsheet.htm one that worked].
We had Mark at [http://www.audiopile.net/ Audiopile.net] send us some samples to our new spec, we checked them, and they worked well. This gave a method for our customers who needed a long B1 cable to get [http://www.audiopile.net/products/Speaker_Cables/NL-4_speaker_cable/NL413_dropdown_cutsheet_2.shtml one that worked].


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.
=== Intermittent Drop Outs Using the {{T1}} and {{Model II}} ===
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.
{{L1 Model II with T1 Sound Drop Outs}}


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[[Category:B1]]
[[Category:B1 Bass Module]]
[[Category:Troubleshooting]]
[[Category:Troubleshooting]]
[[Category:Audiopile]]
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