Noise from home theatre speakers can come in a few forms. Hissing is typically a fault with one or more components in a home theatre. Reducing this background noise is critical for fully enjoying the theatre system, so that only the content on the DVD or Blu-ray disc is audible. Removing this noise is a process involving isolating the source of the issue and taking steps to remedy it.
- Skill level:
- Moderately Easy
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Turn off all the components in your home theatre. Leave everything plugged into AC power. Unplug all source devices from the preamplifier or receiver. Unplug the preamplifier or receiver from a separate amplifier, if so equipped.
Turn on the amplifier, if you have a separate amp in the system. Otherwise, turn on the receiver.
If no noise is detected, begin to sequentially connect the source components until the hissing sound is detected. This is your problematic component.
Remove the cables connecting the component to the receiver or preamplifier. Replace them with new and/or shorter versions. If the noise continues, remove the component for service.
Tips and warnings
- Always try to separate AC power cords from low-level interconnects, such as RCA cables. If they must meet, attempt to make them cross at a 90-degree angle to cancel noise.
- Turn down the volume. Raising the volume past a receiver's or amplifier's limits will showcase hiss typically below the noise floor.
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