Long Cable Runs With Separate Cable For Dc Power And Audio; En3-To-Pigtail Cables; Limit Leds - Meyer Sound ULTRA XP Operating Instructions Manual

NOTE: For more information on cable assem-
bly, refer to Appendix B, "Assembling Loud-
speaker Cables."
NOTE: For a complete list of available cables
and cable accessories from Meyer Sound,
refer to Appendix A, "Ultra XP Accessories."
LONG CABLE RUNS WITH SEPARATE CABLE
FOR DC POWER AND AUDIO
For installations where Belden 1502 is not feasible, or for
installations that require cable runs longer than 150 feet, you
can use separate cables for DC power and balanced audio:
a large-gauge cable for DC and a high-quality, balanced
audio cable for audio. The separate cables attach to the
Phoenix connector at the loudspeaker as shown in the
Figure 1. Cable runs longer than 150 feet for DC power
require cable gauges larger than 18 AWG; for more informa-
tion, see "Cable Lengths and Cable Gauges" on page 10.
DC
cable
Audio
cable
Figure 1: Separate Cables for DC Power and Balanced Audio

EN3-TO-PIGTAIL CABLES

Ultra XP loudspeakers with EN3 connectors ship with an
EN3 5-pin-to-pigtail cable. The EN3 end of the cable con-
nects directly to the loudspeaker input connector. The pigtail
end of the cable, which connects to the external power sup-
ply, can be terminated with either an EN3 5-pin male con-
nector (included with the MPS-488HPe) or a Phoenix 5-pin
female connector (included with the MPS-488HPp). The pig-
tail can also be spliced to a longer loudspeaker cable or to a
junction box. The EN3-to-pigtail cable uses Belden 1502
cable (or equivalent), which can be wired for both DC power
and balanced audio. The EN3-to-pigtail cable is available in
plenum or regular (non-plenum) versions.
EN3-to-Pigtail Cable

LIMIT LEDS

When source levels for an Ultra XP loudspeaker exceed
maximum input levels for its drivers, limiting is engaged and
is indicated by the two Limit LEDs on the rear user panel.
The bottom LED indicates limiting for low-frequency chan-
nels. The top LED indicates limiting for high-frequency chan-
nels. When engaged, limiting not only protects the drivers,
but also prevents signal peaks from causing excessive dis-
tortion in the amplifier's channels, thereby preserving head-
room and maintaining smooth frequency responses at high
levels. When source levels return to normal, below the lim-
iter's threshold, limiting ceases.
High-frequency
Low-frequency
Limit LEDs
Ultra XP loudspeakers perform within their acoustical speci-
fications at normal temperatures when the Limit LEDs are
Pin #1 48 V DC (–)
unlit, or when the LEDs are lit for 2 seconds or less and then
Pin #2 48 V DC (+)
turn off for at least 1 second. If an LED remains lit for longer
Pin #3 Audio shield
than 3 seconds, the loudspeaker enters hard limiting where:
Pin #4 Audio (–)
Pin #5 Audio (+)
■
■
■
Increases to the input level have no effect.
Distortion increases due to clipping and nonlinear driver
operation.
Drivers are subjected to excessive heat and excursion,
compromising their lifespan.
CAUTION: The Limit LEDs indicate when a
safe, optimum level has been exceeded. If an
Ultra XP loudspeaker begins to limit before reaching
the required SPL, consider adding more loudspeak-
ers to the system.
ULTRA XP OPERATING INSTRUCTIONS
11