Voltage Selection; Ground Switch - Emerald Physics EP 200.2SE Owner's Manual

Voltage selection

115v - 230v AC Voltage Change
The EP 200.2SE is capable of operating in multiple regions – both 115v/60Hz and
230v/50Hz are served. To use this product in a different region other than the original
Factory Set Voltage one must refer this unit to qualified service personnel as the voltage
"change: is performed by de-soldering from the original position and then re-soldering
wires to the newly selected region. THIS MUST BE DONE BY A QUALIFIED SERVICE
TECHNICIAN ONLY. The unit may be seriously damaged if this is set incorrectly.

Ground Switch

(please read this section carefully and
completely)
Ground loops occur when two components in your system have a different ground
potential. The difference is amplified as 60Hz hum. Neither product is broken, they
simply have different ground potentials. Ground loops can even come with the ground
connections of the audio cables or even the ground wires of the various AC cords in
your system.
Grounded is the normal position for this switch (the out position). If you hear
background hum in the speakers connected to your amp, try setting the Ground Lift
Switch to its Lift position by pushing the button in. The ground switch disconnects or
"lifts" the audio circuit from the chassis ground. This often fixes the ground loop that is
causing hum in your system.
Wherever possible, plug your Emerald Physics amp into the same AC outlet that your
accompanying audio components (especially any other HT Processor or Amp) are
plugged into. The ground potential between different AC outlets may be higher or lower,
resulting in audible hum.
Installation and Ventilation Requirements
Install your Emerald Physics amp away from heat sources. Observe the following
ventilation guidelines when installing the amp in an equipment rack or any other
enclosed space: You should never install the amp in an unventilated area without some
breathing room around it because hot air will not exhaust adequately to prevent
overheating. Do not place the unit on carpeting or any other material that could obstruct
air flow around the bottom vents of the amplifier.
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