Engb
6
System set-up
WARNING
!
Loudspeaker systems are potentially dangerous objects if used incorrectly. Please ensure that you read this section fully, and contact your local dealer should you be in
any doubt over correct operation procedures.
!
Professional loudspeaker systems are capable of producing damage-inducing sound pressure levels, and hence care should be taken when setting your system up,
particularly when it comes to loudspeaker placement within a venue. Damage to the ear can result from levels above 90 dB under prolonged exposure.
Stand mounting
The XY-81 can be mounted from a loudspeaker stand using the integral polemount adapter for a standard 35 mm (1.4 in.) loudspeaker stand. When mounting in this way,
please consider the following:
!
Ensure your stand height is locked off and the tripod legs are positioned so as to be stable.
!
Check the weight loading of your stands before attempting to mount the loudspeaker.
!
Do not stack a second loudspeaker on top of the stand-mounted one.
!
Ensure cables are run so as to leave enough slack to enable neat wiring, and thus reduce the risk of the speaker being pulled over. Loose cables should be covered or
taped down wherever possible to reduce trip hazards.
!
When using poles on top of subwoofer systems, please observe similar precautions.
Ground stacking
!
Ensure that the floor or stage surface can withstand the weight of the system.
!
Wherever possible, avoid high stacks and use ratchet straps to secure loudspeakers together. Please also remember that vibrations from subwoofer systems can shake
other loudspeakers out of place, which may present a toppling hazard. The use of ratchet straps and non-slip material is recommended to prevent this.
Cabling and amplifier selection
The XY-81 is designed to be used with professional power amplifiers providing the following power outputs:
!
700 W/channel into 8
W
NOTE
A small power amplifier working too hard is more likely to damage a loudspeaker than a large power amplifier working within its operating range.
It is good practice to use an amplifier equal to the programme power rating of the loudspeaker — so as to retain sufficient headroom and good dynamic range. Care should be
taken during operation to avoid amplifier clipping — as this can cause serious damage to your loudspeakers. If in doubt, please contact your dealer who will be happy to assist
you in correct amplifier choice and setup.
Cabling
The XY-81 is supplied as standard with Neutrik SpeakON
™
NL4 connectors, wired pin 1+/1–. It is recommended that the resistance of your cable be less than one tenth of the
nominal system impedance. Given below are the recommended maximum cable lengths for different cross-sections and impedances.
Conductor cross sectional area
Maximum recommended cable length
4
W
8
W
16
W
1.0 mm
2
11 m
22 m
44 m
1.5 mm
2
17 m
34 m
68 m
2.0 mm
2
22 m
44 m
88 m
2.5 mm
2
29 m
58 m
116 m
4.0 mm
2
44 m
88 m
176 m
6.0 mm
2
66 m
132 m
264 m
!
Pins 2+/2– on the Neutrik SpeakON
™
connectors are wired together to allow link-through with 4-core cables.
Protective DSP settings
WARNING
The XY-81 requires no DSP programme to function correctly. However, excessive low frequency information will cause the LF drive unit’s excursion to increase, which can
result in damage to your loudspeaker.
The higher you raise the cut-off frequency on a high pass filter for an XY-81, the more headroom and overall sound pressure level output there is available. For most medium-to-
high level applications, we would recommend a minimum of a 70 Hz high pass filter with a 24 dB/octave slope to sufficiently protect the loudspeaker. For higher SPL applica-
tions, we would recommend raising this cut-off even higher. We would stress that the higher the cut-off frequency, the safer the loudspeaker will be.
