Connec tions, Very large subwoofer array (vlsa), Speaker wire – Niles Audio PSW8 User Manual
Page 7: Figure 6, Figure 7
6
Connec
tions
Now, the volume control will raise and
lower the volume for the subwoofers and
the left and right speakers simultaneously.
Additionally, the crossovers are now con-
nected so that the crossover switches can
be adjusted to your requirements. You must
adjust the crossovers on each subwoofer
with this hook-up.
Optionally, a jumper of wire may be con-
nected between the L+ and the R+; and
between the L- and the R-. This connects
both voice coils of the PSW8, giving you
a 2dB increase in output. Since each sub-
woofer’s impedance drops from 8Ω to
4Ω, make sure your amplifier is 2Ω stable
to accommodate the satellite speaker’s
impedance. (See Figure 6).
Very Large Subwoofer Array
(VLSA)
Using four or more PSW8 subwoofers in a
system creates a system of unprecedented
clarity, with stunning bass impact and
potentially extraordinary maximum vol-
ume capability. Because of the extremely
low impedance of a parallel VLSA system,
multiple channel amplifiers are normally
used to power them. Because of this, in-
wall volume controls are incompatible
with VLSA systems.
In a system of this type, it is recommended
that the satellite speakers be driven full
range (or with an external electronic
crossover) by a separate amplifier channel.
Connections are straight-forward; two
conductor wires connect each amplifier
channel to each individual subwoofer.
(See Figure 7)
.
Each PSW8 has a jumper installed to paral-
lel the voice coils for maximum efficiency.
(See Figure 6)
.
The crossover controls on each subwoofer
affect only the subwoofer response. Level
controls on the amplifiers facilitate blend-
ing and compensation for placement.
Speaker Wire
For most applications, we recommend you
use 16 or 18 gauge wire. For wiring runs
longer than 80 feet we recommend 14
gauge wire. The no strip terminals of the
PSW8 speakers will accommodate up to 12
gauge wire. When you run wire inside
walls, special jacketing (CL-2 or CL-3) is
required to both protect the wire and for
fire prevention. In some areas conduit is
required. For a trouble-free installation, low
voltage wire such as speaker wire must be
run in accordance with the National
Electrical Code and any applicable provi-
sions of the local building code. Consult
your local Niles dealer or your building
contractor if you are unsure of code
requirements in your area.
Figure 6
Connecting the two voice coils in parallel with a
jumper (a piece of speaker wire).
SI-1230
Subwoofers
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Figure 7
Connections to a VLSA are normally made from
each PSW8 to a multi-channel amplifier like the
Niles SI-1230 twelve-channel amplifier.