ETI Sound Systems, INC LX-18 - Manual (Page 3)

3
CHOOSING AN AMPLIFIER:
The LX-18V2 includes (2) 1/4” phone
jacks and one Neutrik NL4 Speakon
input terminals. All three terminals are
internally connected in parallel. Each of
the three connections can be used as
an input or as an output.
1. Neutrik NL4 Terminal
2. 1/4” Phone Jacks
2 1
1/4” Phone Jack Wiring
NEUTRIK CONNECTOR
Pin 1 +............Subwoofer + (input or output)
Pin 1 - ............Subwoofer - (input or output)
Pin 2 +............Subwoofer + (input or output)
Pin 2 - ............Subwoofer - (input or output)
Important: When connecting a speaker to an amplifier or when connecting two speakers together, it
is important to match the polarity (+/-). Connect positive-to-positive and negative-to negative.
For optimal performance, it is extremely important that an
electronic crossover be used in the audio system. An electronic
crossover will provide a low-pass output allowing the LX-18V2 to
only play low frequencies. B-52 recommends setting your
low-pass crossover filter between 80 to 120 Hz, depending upon
the venue and sound desired. In case of doubt, set the low-pass
crossover to 100 Hz.
It is highly recommended to use an electronic crossover with
24 dB per octave slopes or higher. If your amplifier or electronic
crossover provides a 30 Hz subsonic filter, make sure this filter is
turned ON. The subsonic filter will prevent the subwoofer from
reproducing frequencies below 30 Hz. At high SPL, frequencies
lower than 30 Hz can damage to the subwoofer.
USING AN ELECTRONIC CROSSOVER
LX-18V2 CONNECTION DIAGRAMS
STEREO CONNECTION
MIXER
ELECTRONIC CROSSOVER
LOW PASS OUTPUTS
L AMPLIFIER R
L R
L R
LX-18V2 LX-18V2
MIXER
ELECTRONIC CROSSOVER
LOW PASS OUTPUTS
L R
BRIDGED CONNECTION
AMPLIFIER
BRIDGED OUTPUT
L or R Out
LX-18V2 LX-18V2
Connecting two LX-18V2 subwoofers in
parallel results in a 4 ohm load.
There are numerous other configurations available.
Please consult your Authorized B-52 Dealer or
contact B-52’s Customer Service.
STEREO OUTPUT
1) It is important to choose an amplifier that matches the power
rating of the LX-18V2 (see specifications on back page).
2) When using TWO (2) LX-18V2 subwoofers in you system you
may choose an amplifier that delivers up to 750 watts @ 8 ohm
stereo or an amplifier that delivers up to 1500 watts @ 4-ohm
bridge (when connecting two LX-18V2 in parallel). Other
combinations are possible––consult your authorized dealer or
call B-52 for additional details. See Connection Diagram (right).
3) Use caution when using large amplifiers. All amplifiers are
capable of putting out much more power than they rated for.
The amplifiers rating is specified as undistorted output (low
THD––total harmonic distortion). Amplifiers are capable of
producing much greater power that they are rated for when
driven into clipping.
4) Under powering the LX-18V2 may also damage the subwoofer.
Using a small amplifier and clipping its high output signal could
damage the subwoofer. Clipping the amplifier may distort the
signal and cause over heating of the voice coil.
CONNECTORS:
(Amp must be stable at 4
ohms in the BRIDGE mode)