Up-4Xp Current Draw And Cable Requirements - Meyer Sound UP-4XP Operating Instructions Manual

Clipping (Red)
The UP-4XP turns red when the loudspeaker's input stage
clips, causing the amplifier to overload. When the LED is
red, the source level should be reduced.
CAUTION: If the UP-4XP LED turns solid red
and the loudspeaker continues to output audio,
though at reduced levels, the loudspeaker's voltage
may have dropped below 25 V DC. When these con-
ditions are encountered, operation of the loudspeaker
should cease and its power supply and cabling
should be verified.
UP-4XP CURRENT DRAW AND CABLE
REQUIREMENTS
Each UP-4XP loudspeaker draws a maximum current of
4.05 A continuous and 4.50 A peak from its external 48 V
DC power supply. The current draw for the UP-4XP is
dynamic and fluctuates as operating levels change. The
cabling between the UP-4XP and its external power supply
adds resistance and hence causes a voltage drop at the
loudspeaker. Because lower DC voltages compromise
amplifier performance (peak SPL), and in some cases fre-
quency response, cable resistance should be kept to a mini-
mum.
NOTE: For long cable runs, you can use a large
cable gauge for DC power and a separate bal-
anced audio cable for audio. For more information,
see "Long Cable Runs with Separate Cable for DC
Power and Audio" on page 14.
Cable Lengths and Cable Gauges for UP-4XP
Loudspeakers
Cable lengths up to 150 feet between the UP-4XP and its
external power supply are supported with only 1 dB of peak
SPL loss using 18 AWG wire. Longer cable lengths are pos-
sible with heavier wire gauges (see Table 1 and Table 2).
Table 1: UP-4XP Loudspeaker Cable Lengths (AWG)
Cable Gauge Resistance
(/ft)
12 AWG 0.0016
14 AWG 0.00253
16 AWG 0.00402
18 AWG 0.00636
20 AWG 0.01008
Table 2: UP-4XP Loudspeaker Cable Lengths (European)
Cable Gauge Resistance
(/m)
2.50 mm 2 0.0052
1.50 mm 0.01076
2
1.00 mm 0.02087
2
0.75 mm 0.03307
2
NOTE: The total cable resistance between the
UP-4XP and its external power supply should
not exceed 2 ohms.
Calculating the Maximum Cable Length
The maximum cable length for a UP-4XP can be calculated
with the following formula:
maximum length = 2 ohms / 2 * cable resistance
For example, the maximum length of an 18 AWG cable with
a resistance of 0.00636 is 157.2 feet (2 / 2 * 0.00636).
UP-4XP OPERATING INSTRUCTIONS
Approximate
Max. Length
600 ft
375 ft
237 ft
150 ft
87 ft
Approximate
Max. Length
157 m
87 m
45 m
27 m
13