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This Installation Guide is applicable for the following powered, ceiling-mounted audio systems:
Astronaut™ Series
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Installation of Cetacea Sound speaker systems should adhere to Good Installation Practices and Standards as published by several certifying agencies, including the AEA, AES, and the ICIA. These practices and standards are assumed in the advice that follows.
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Grounding
Cetacea Sound speakers can and often are affected by inappropriate electrical grounding. Although all current Cetacea power supply models are isolated from ground, problems can still arise during installation.
Do not assume that proper safety grounding and electronic noise reduction are one and the same. The building electrical contractor is rarely asked to do the latter which exposes every audio installation to ground noise both on the power line as well as the signal line.
Cetacea Sound powered speakers have built in low and high voltage, thermal, and diode protection for polarity; however, ground noise can still be caused from ground loops within projectors, DVDs, and computers plugged into the same circuit. If you hear a 60 cycle hum from the speaker, try plugging it into another AC outlet either in the room or across the hall using an extension cord. If the hum is eliminated, then a different source of AC power will have to be used or an electrical contractor will have to provide a common ground for all equipment on the circuit in question.
Ground noise, hiss, and distortion can be caused on the signal line if the signal wire is connected to an improperly designed source. Projectors, personal computers, wall plates, and other devices are all suspect if it is determined this is the case.
To diagnose the noise source, first disconnect the power cord at the speaker. Second, disconnect the signal wire from the speaker. Connect another source to the speaker like a personal computer, portable CD player, or iPod. Finally, reconnect the power cord. If the noise was eliminated, then the first signal source is suspect.
Systematically remove each source of the signal path one by one until the culprit is discovered. Once the source with the noise is discovered, find its fault through another process of elimination. Some signal sources just don’t work the way they are supposed to and mislead one to think the speaker has a problem, which in fact it does not.
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