Legrand AU0100-WHLA-V1 - Manual (Page 2)

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INSTRUCTION/INSTALLATION SHEET
Speaker Level / Impedance Matching
Volume Control
IS-1507094 REV. O
©Copyright 2009 by On-Q/Legrand All Rights Reserved.
accommodate up to 14 gauge wire.
2) A single 16/2 speaker wire should be run from each speaker location to the outlet box or low voltage
bracket at the volume control location.
B. “Trim-out” steps:
1) Strip 3/16ths of an inch from all conductors (feed from distribution and
runs to speakers) and insert the wires into the wiring blocks (see
Figure 3) of the volume control.
2) Tighten screws onto wire and give them a tug to insure they are
properly fastened.
NOTE: BE SURE NOT TO REVERSE THE AMPLIFIER OR SPEAKER
CONNECTIONS OR DAMAGE TO THE AMPLIFIER COULD RESULT!
3) Install the volume control into the low voltage bracket/electrical box.
4) Determine how many pairs of speakers will be powered by the same amplifier (in parallel).
5) Determine the speaker output impedance or ohm capability of the amplifier (typically 8 ohms, 4 ohms or 2
ohms). This will be listed in the specification of the amplifier. It yields how "low" of a load the amplifier can
safely run before damage or over heating occurs.
NOTE: Impedance varies with
frequency, so in actuality, no
load is seen as a constantly
stable (8, 4 or 2 ohms), it
varies as frequency varies.
(This is why some of the
higher selections were made
in the Multiplier chart.),(see
Figure 4).
NOTE: This chart refers to 8
ohm speakers. If the Speakers
being used are some other
impedance, you must
calculate the parallel
impedance and multiply it by
the appropriate multiplier (X2,
X4 or X8), see Figure 4, to
match the load to the
amplifier’s capabilities. Non-
impedance matching=X1 (see
Figure 5 for the formula to
calculate impedance).
Figure 3
Figure 4