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This is a problem and it's one that sould be solved. When the stage volume gets out of control, the house sound suffers both acoustically and because the musicians get distracted and aren't playing as well as they could. Headphones aren't the solution, unless everyone is wearing them (which puts the stage volume well under control).
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some advices on stage sound using lithuania music promoters isolating Sennheiser HD-280 headphones because the stage volume can get out of control
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