Emotiva Airmotiv 6 Owner's Manual page 27

Problem: No output at all
• Verify that you have power.
• Check your signal source.
• Verify that your front panel Level control is not set to its minimum setting.
• If the front panel power indicator is lit red, but the airmotiv is playing quietly
or is silent, then there is a fault with either your signal source or the monitor.
Problem: Excessive hum or noise
• Read the chapter titled Avoiding Hum and Noise in the Connections section of this
manual.
• Check your signal source.
• Verify that all cables are plugged fully in, that the connectors fit tightly, and that the
cables and connectors are in good condition.
• Try repositioning cables. If you have signal cables running near power cables, try
moving them further apart. (This is especially important with unbalanced cables.)
• If you are using unbalanced connections, try higher-quality cables with better
shielding. If that reduced but fails to eliminate the hum, consider trying balanced
cabling (especially for long runs or where runs next to power cables are
unavoidable).
• If you're already using a balanced connection, the balanced outputs on some
equipment may offer various options including "ground lift". While none of these
options is specifically recommended, some may produce good results in some
situations.
• Some audio equipment (especially vacuum tube type) has a high output impedance,
which makes it inherently sensitive to picking up hum and noise, especially if only
unbalanced connections are provided. It is essential that signal cables used with
such equipment be kept short, of good quality, and not run near power cables.
• In a new installation, especially in a studio environment, verify that your cables are
wired properly. (In studios, pros often customize cables for various reasons, which
may include removing ground connections from one or both ends.) If you suspect
that your cables are non-standard, either check them with an ohmmeter or try
another cable.
• Some difficult installations may require a balanced connection to completely
eliminate hum and noise.
Problem: Intermittent sound
• If the power indicator is flashing red, this indicates that the protection circuitry is
engaging frequently, which may result in intermittent or distorted sound.
• If the protection circuitry is engaging, yet the sound level is not excessive, then
excessive low-frequency signal (possibly from a warped record on a turntable),
or excessive high-frequency signal (possibly from high-frequency feedback or a
defective signal source) could be triggering the protection circuitry.
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