ENGLISH
USER MANUAL
SYNQ
®
1/18
RS-218B
Congratulations and thank you for buying this SYNQ
®
product. Please read these operating instructions
carefully so you will know how to operate this product properly. After you have finished reading the
instructions, put them in a safe place for future reference.
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ON
’
T FORGET TO REGISTER YOUR
RS-218B
CABINETS
. Y
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FEATURES
High power double 18” subwoofer with very compact design
Can be used for both fixed installations and mobile applications
The horn loaded design guarantees a nice, punchy bass reproduction
Perfect for clubs, discotheques, stage, rental, Pro-DJ, ...
Very strong plywood enclosure with:
Durable, scratch resistant, painting
Integrated handles
Heavy duty rubber feet
Steel front grill
Fixing points on the back panel for optional wheels
Equipped with 2 high power 18" woofers with ALU basket
A perfect match with 2x RS-15 cabinets
SAFETY PRECAUTIONS
The RS-218B can easily reproduce sound pressure levels (SPL) sufficient enough to cause severe 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.
The woofer is 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 way.
CONNECTIONS
The RS-218B has two Neutrik
®
Speakon
®
connectors. Speakon
®
wiring is made as follows:
POSITIVE
=
+1 and +2
NEGATIVE
=
-1 and +1
Cables to be used:
You can use readymade cables but 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
®
NL4FC connectors. This connector has 4contacts: +1 -1 +2 -2. 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. Since the Speakon
®
contacts are interconnected (+1 to +2 and
-1 to -2), you can also use 4x 2.5mm² LS-cables to reduce signal losses due to long cables.
Important! Don’t mix up the + and – contacts, if you inverse the conductors, poor sound quality with
a lack of low frequencies will be the result.
ENGLISH
USER MANUAL
SYNQ
®
2/18
RS-218B
Input connector plate:
On the connector plate you will find a switch behind a transparent cap. Just unscrew the 2 small bolts
(marked “C” on the picture) so you can remove the cap and change the switch position. You can put the
switch in 2 different modes (also see the electronic diagram of the switch) :
A) Woofersseparated:
Used when you only install 1 subwoofer or when the amplifier is not powerful enough to drive 1
subwoofer per channel.
IMPORTANT: Both inputs must be connected and the amplifier must be set to MONO mode (NOT
Bridge!)
Both woofers inside the cabinet have their own Speakon
®
input connector. This means that you can
connect the left output of an amplifier to the left input of the subwoofer and the other amplifier output to
the right Speakon
®
input. The power needed at the inputs is 2x 600Wrms @ 8ohm. (2x 1200Wpeak)
B) Woofers in parallel:
Used when you have powerful amplifiers that can deliver the high power needed by the
subwoofer.
The power needed at the inputs is 1x1200Wrms @ 4ohm. (1200Wpeak)
Both woofers/Speakon
®
connectors are connected in parallel. If you like, you can connect a second RS-
218B in parallel.
Attention:
when a second subwoofer is connected, the impedance drops from 4
Ω
to 2
Ω
! Please note
that most amplifiers do not support heavy working conditions while under 2
Ω
load. Moreover the
damping factor of your amplifier drops significantly resulting in a weaker bass response.
Preferred setup combination:
When used with the RS-15 cabinets you should try to keep a certain balance with this subwoofer to make a
good sounding system. We suggest using 2pcs RS-15 on 1pc RS-218B. You should always use separate
amplifiers for the top and sub cabinets plus an active crossover or audio processor. Of course you are not
limited to this combination, you can experiment with other setups as much as you like!
WHEEL PACK
If used on the road, you can fix an optional set of 4 wheels to the back of the subwoofer. The subwoofer is
standard equipped with inserts so you can attach the wheels easily with the included bolts.
MAINTENANCE
Clean the cabinet with a sponge and some non aggressive soap solution. Don’t use any chemical solvents
as they attack the enclosure!
