Staub Electronics EVC-100S-WHLA EPISODE - 100 W SLIDING VOLUME CONTROL - Manual (Page 3)

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WIRING
The EVC-100R and the EVC-100S can accommodate 14 to 22-
gauge speaker wire. The longer your run, the thicker the wire should
be. All in-wall and in-ceiling wire installations are subject to local
code fire ratings. Never use lamp or zip cord for an installation where
the wire will be in a wall or ceiling. Always use multi-strand copper
speaker wire for your installations. UV protected wire should be
used for outdoor installations.
• Check your local building and fire rating codes for low voltage device
installation & wiring requirements before you begin your installation.
• In existing construction installations, check for obstructions
such as any pipes, conduit or wiring before cutting into drywall.
SETTING THE IMPEDANCE SWITCH
A single switch on the EVC-100R and the EVC-100S changes the
impedance setting of the volume control. Three factors determine
the correct setting:
1) The minimum impedance rating of the amplifier being used.
2) The number of speakers being connected to the amplifier channel.
3) The impedance of the speakers being connected to the amplifier channel.
Carefully determine the system impedance. Once that is done, the switch
settings for the volume control are easy to make.
Two simple equations will determine the system impedance:
1) Impedance Rating of Speakers divided by the number of speakers
connected to channel = System Impedance
Is/N=It
2) Amplifiers Minimum Impedance Rating / by System Impedance
= Impedance Match Switch Setting
Im/It=X.