Connections; Placement; Room Acoustics - Mackie S410s User Manual

Passive subwoofer
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CONNECTIONS

The S410s has two connectors labeled INPUT and
THRU. These are both Neutrik Speakon™ connectors,
which provide a secure and reliable connection for loud-
speakers and subwoofers. These connectors are wired
in parallel, and allow for connecting the input signal to
another speaker's input.
NEVER connect more than one
output from a power amplifier to the
S410s INPUT or THRU connectors.
Keep in mind, when connecting two or more speakers
in parallel using the "thru" connections, that you want
to avoid going below the minimum impedance require-
ments for your power amplifier.
The S410s has a nominal impedance
of 8 ohms.
Two 8 ohm cabinets in parallel equals
4 ohms.
Three 8 ohm cabinets in parallel equals
.7 ohms.
Four 8 ohm cabinets in parallel
equals  ohms.
Use high-quality speaker cable as recommended by
the power amplifier manufacturer.
DO NOT use coaxial shielded cable
like a guitar cord to make speaker
connections. They are not designed
to handle the high currents required
to drive a loudspeaker.
The Speakon connector is wired as follows:
Pin 1+ = Signal ("+" or hot)
Pin 1– = Ground ("–" or cold)
Speakon Connectors

1–
1+
COLD
1–
1+
2+
HOT
2–

PlACEMENT

The S410s subwoofer is designed to sit on the floor
or stage. A socket is provided on the top of the cabinet
for mounting another speaker on top of the S410s, like
the Mackie S408 two-way loudspeaker. Use the optional
Mackie speaker mounting pole (SPM100) to mount
them on the S410s (see Hookup Diagrams on page 5).
WARNING: The cabinet has no rig-
ging points and is not suitable for
rigging. NEVER attempt to suspend
the S410s by its handles.
As with any powered components,
protect them from moisture. If you
are setting them up outdoors, make
sure they are under cover if you
expect rain.

Room Acoustics

The S410s subwoofers are designed to sound as neu-
tral as possible; that is, to reproduce the input signal as
accurately as possible.
Room acoustics play a crucial role in the overall per-
formance of a sound system. Here are some additional
placement tips to help overcome some typical room
problems that might arise:
Avoid placing loudspeakers in the corners of a
room. This increases the low frequency output and
can cause the sound to be muddy and indistinct.
Avoid placing loudspeakers against a wall. This, too,
increases the low frequency output, though not as
much as corner placement. However, if you do need
to reinforce the low frequencies, this is a good way
to do it.
Avoid placing the speakers directly on a hollow
stage floor. A hollow stage can resonate at certain
frequencies, causing peaks and dips in the fre-
quency response of the room. It's better to place the
loudspeakers on a sturdy table or stand designed to
handle the weight of the cabinet(s).

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