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VLF Owner's Guide
V SERIES models
USE THE CORRECT WIRE OR CABLE
CONNECTIONS AND INSTALLATION
IMPORTANT:
All electrical installation connections for loudspeaker lines are subject to all applicable
governmental building and fire codes. The selection of appropriate electrical hardware to interface with
the V SERIES loudspeaker lies solely with the installation professional. Community recommends that an
appropriately licensed engineer, electrician, or other qualified professional identify and select the appropriate
conduit, fittings, wire, etc. for the installation.
Figure 1a.
Wire Connectors
Figure 1b.
NL4-Type Connector
The VLF subwoofers are intended to be connected directly to the amplifier. The
VLF208 and VLF208LV come with two methods of connecting the amplifier
to the subwoofer; a terminal strip and an industry standard NL4-type locking
connector. These two connectors are wired in parallel with each other, on all
models.
If connecting to the terminal strip, terminating the wires with a spade or ring
connector (Figure 1a) is recommended for secure connections. The maximum
width of the ring or spade lug should be 0.375" (9.5mm), or less. The terminal
screws are #8 (M4). The maximum wire size that can be accommodated for
bare wire connections is 10 AWG (5.26 mm
2
).
Note:
Wire insulation colors may vary depending upon region or manufacturer. Be consistent with
conductor color use throughout the system.
NL4-TYPE CONNECTORS
Terminations may be soldered, or made by means of their built-in screw and
pressure clamp (Figure 1b). If using the pressure clamp, it’s important to tighten
it fully, then to wait about ten minutes (longer is better), then to tighten it again.
This is because copper wire flows under pressure. After initially tightening the
screw clamp, some minutes later the screw will no longer be as tight due to the
effect of the compression on the copper. Typically, only one cycle of “tighten –
wait – re-tighten” is required for a secure connection.
The VLF208 has one (1) NL4-type locking connector, and the VLF208LV has two
(2) NL4-type locking connectors (Figure 2).
Ring
terminal
Spade
terminal
DANGER
: When wiring the amplifier(s) to the loudspeaker(s), always power-down
the amplifier(s) and disconnect their AC Mains plug(s). Many high power amplifiers
can deliver enough voltage and current to cause a harmful or lethal electric shock.
Shocks from very low frequencies, such as kick drums, can cause the human heart to stop
beating at relatively low power levels.
WARNING
: After wiring the amplifier(s) to the loudspeaker(s), first power up all
devices that are upstream of the amplifier, such as mixers, equalizers, compressor/
limiters, etc., before powering-up the amplifier. This is to avoid passing any clicks
or pops that may originate in the upstream devices to the loudspeakers. The amplifier
should initially be powered-up with its gain controls turned all the way down. After
making sure that a continuous signal is present, such as music source playing, slowly
raise the level of the gain controls to establish that the wiring has been installed correctly.
Only then should the loudspeaker be operated at normal output levels.
1+
1–
2+
2–
+
–
from
Amplifier
