JB Systems PL-12 Mode D'emploi page 3

ENGLISH
FEATURES

Light weight heavy duty Polypropylene cabinet

Perfect for permanent installations

Perfect for Portable use

High power 12" Woofer

High power 1" Compression Driver & Horn
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Built-in Rigging points
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Built-in stand adapter
 ®
Dual Speakon connectors

Built-in heavy duty carrying handle
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Heavy duty rubber feet.
SAFETY PRECAUTIONS

The PL-12 can easily reproduce sound pressure levels (SPL) sufficient enough to
cause sever and permanent hearing damage. Always protect your ears when you are
exposed to SPL in excess of 85dB!

Be sure that your power amp is turned off before connecting the speakers.

Even if the speaker cabinet is made of water resistant material, the woofer and
tweeter are not protected against humid and rain. Therefore this speaker is intended
for indoor use only, use of this product outdoors, in humid conditions, voids all
warranties.

Always mount this speaker in safe and stable matter.

Take special care when the cabinets are suspended. This is potentially dangerous and
should only be carried out by technicians who have perfect knowledge of the
techniques and regulations of rigging speakers!
CONNECTIONS
®
The PL-12 has two Speakon connectors. Both connectors are connected in parallel. This
means that you can connect a second PL-12 in parallel.
Attention: when a second speaker is connected, the impedance drops from 8Ω to 4Ω! In
most cases you can only connect
amplifier supports 2Ω loads, you can connect up to 4 cabinets to each amplifier output.
Parallel connection @ 4Ω:
JB SYSTEMS 1/18
OPERATION MANUAL
2 cabinets together. However, if
PL-12
ENGLISH
Parallel connection @ 2Ω: (ATTENTION: not suited for most amplifiers!)
Cables to be used:
You can use readymade cables such as our JB SYSTEMS codes 2-0505 (5m) or
2-0510 (10m) or 2-0525 (25m). Of course you can also assemble the speaker cables
yourself. Take care to use good quality speaker cable with at least 2x 2.5mm² conductors.
You will also need a pair of Neutrik Speakon
4contacts: +1 -1 +2 -2. Only use the +1 and -1 contacts. Your speaker cable has 2
conductors with different colors. Be sure to connect the same color on each side of the
cable to the corresponding contact! (+1 to +1 and -1 to -1).
If you inverse the conductors, poor sound quality with a lack of low frequencies will
be the result.
RIGGING POINTS
The PL-12 cabinets have 5 rigging points using M8
inserts. These can be used to suspend (fly) the
cabinet in the air. For this purpose you can use
heavy duty eyebolts with metric M8 thread. In most
cases 2 cables will be attached to the top and one is
used to pull up the back.
Anyway always take special care when the cabinets
are suspended. This is potentially dangerous and
should only be carried out by technicians who have
perfect knowledge of the techniques and regulations
your
of rigging speakers!
STAND ADAPTER
The PL-12 cabinets also have a stand adapter on the bottom that can be used to put the
cabinet on a proper and stable speaker stand. Tighten the screw of the stand adapter to
prevent the speaker from rotating during use.
MAINTENANCE
Clean the cabinet with a sponge and some non aggressive soap solution. Don't use any
chemical solvents as they attack the enclosure!
JB SYSTEMS
OPERATION MANUAL
®
NL4FC connectors. This connector has
2/18 PL-12