Emotiva X-Ref 10 - Manual (Page 27)

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Problem: No output at all
• Verify that you really have no output, and that you should have output.
(Subwoofers reproduce only very low frequencies. If you happen to be playing
something without low frequency content, then nothing will come from the
subwoofer. In addition, since low frequency sound has very little localization
information, if your main speakers also produce low frequencies, it may be difficult
to notice the contribution from the subwoofer with some program material.)
• Verify that the subwoofer output on your source equipment is active and configured
correctly, and that the output is active in the particular mode you are using with
the content you are using. (Some combinations of content, processing mode, and
configuration, don’t use the subwoofer. For example, some decoders don’t use the
subwoofer at all when playing stereo content in some modes.) If the subwoofer
produces output in any mode with any source material, then the subwoofer and
connections are probably working correctly and the problem lies with your source
component configuration or program material
• Verify that you have power.
• If you have power and signal, but still have no output, then please contact
Emotiva Technical Support.
Problem: Excessive hum or noise
• 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).
• 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. This is also true for some electronic
crossovers (especially passive models). It is essential that signal cables used with
such equipment be kept short, of good quality, and not run near power cables.
• Some difficult installations may require a balanced connection to completely
eliminate hum and noise.