Other Probable Causes Of Noise; One Or More Red Lights On The Front Panel Are On - Emotiva MPS-1 User Manual

• Check that the interconnect cables to the amplifier do not have any broken connections. The best
way to do this is to substitute a known good connection for the suspect connection. If you reverse the
cables and the problem goes away, the cable may be damaged or broken. This is possible even if you
can't physically see the break as the strain for pulling on audio cables can sometimes break the wire
internally.
Ground loop isolators are available for audio lines and video devices. You can ask your Emotiva
Dealer for assistance. Although this is not always an ideal solution, the grounding differences be-
tween certain home entertainment components sometimes require ground loop isolators. This is
the exception rather than the rule.

Other Probable Causes of Noise

Speaker noise may also be caused by interference or noise on your AC line. Make sure there are no
large appliances sharing the line, or halogen lamps or light-dimming Triac devices.
Try connecting your system to another AC socket on a separate line.
If the hum is heard from within the MPS-1 and not through the speakers, this may also be caused by
interference on the AC or DC lines. The power transformers may turn this interference into an audible
noise. Internal hum can be made worse by a shelf or cabinet resonating, so try moving the MPS-1 to
another shelf.
Try moving your components further away from the TV, especially if you ever notice the screen has changed
color in the area closest to the component.
If you have very high efficiency speakers, these may tend to reveal noises which other speakers do
not.

One or more RED lights on the Front Panel are On

Each RED light indicates a fault condition for the corresponding power module. A fault condition is
one or more of the following:
• Excessive Operating Temp
• Excessive Current (Short Circuit)
• DC on the Outputs
An excessive temperature fault can be reset by allowing amp to cool and cycling power on/off but-
ton on the front panel. Excessive current (short circuit) can be reset by removing the cause of the
short and cycling power on/off button on the front panel. DC at output is a possible fault condi-
tion that is equipment related and requires technical assistance. Please contact AV123 if you have
repeated problems causing the RED front panel light to illuminate that are NOT thermal or short
circuit related.
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