CHAPTER 2: POWER REQUIREMENTS
10
The maximum number of loudspeakers that can be looped
from the Loop Output connector is determined by the volt-
age of the power source, the circuit breaker rating, and the
rating of the AC power cable connected to the first JM-1P
loudspeaker.
Each JM-1P loudspeaker ships with one AC looping con-
nector for making AC looping cables. Assembled AC loop-
ing cables are available from Meyer Sound (15-inch UL AC
looping cable, PN 28.115.032.01; 0.35 m CE AC looping
cable, PN 28.115.032.02).
CAUTION: Do not exceed the current capabil-
ity of the 20-amp Input connector for the
JM-1P loudspeakers. When looping loudspeakers,
consider the total current draw for all loudspeakers
on the circuit, including the first loudspeaker.
AC Connections with VEAM Cabling
The JM-1P can be ordered from the factory with a VEAM all-
in-one connector. VEAM connectors consolidate AC power,
audio, and RMS into a single cable, facilitating easy connec-
tions and quick setups. For more information, see
Appendix A, “Optional VEAM Multipin Connector.”
POWER CONNECTOR WIRING
The JM-1P requires a grounded outlet. To operate safely
and effectively, it is extremely important that the entire sys-
tem be properly grounded.
When wiring international or special-purpose power con-
nectors:
Connect the blue wire to the black terminal, or the termi-
nal marked with an N.
Connect the brown wire to the red terminal, or the termi-
nal marked with an L.
Connect the yellow and green wire to the green (or green
and yellow) terminal, or the terminal marked with an E.
CAUTION: When creating AC power cables
and distribution systems, it is important to pre-
serve AC line polarity and connect the earth ground
on both ends of the cable. The JM-1P requires a
grounded connection. Always use a grounded outlet
and plug. It is extremely important that the system be
properly grounded in order to operate safely and
properly. Do not ground-lift the AC cable.
JM-1P VOLTAGE REQUIREMENTS
The JM-1P operates safely and continuously when the AC
voltage stays within 95–125 V AC and 208–235 V AC at 50
or 60 Hz. The JM-1P allows any combination of voltage to
GND (neutral-line-ground or line-line-ground).
If the voltage drops below 85 V (brownout), the JM-1P uses
stored power to continue operating temporarily; the loud-
speaker will shut down if the voltage does not rise above the
low boundary before the stored power is used.
If the voltage rises above 235 V, the power supply could
become damaged.
CAUTION: The power source for the JM-1P
should always operate within the required volt-
age range, at least a few volts from the upper and
lower ranges. This will ensure that AC voltage varia-
tions from the service entry — or peak voltage drops
due to cable runs — will not cause the loudspeaker’s
amplifiers to cycle on and off or cause damage to the
power supply.
Powering Up the JM-1P
When AC power is applied to the JM-1P, its Intelligent AC™
power supply automatically selects the correct operating
voltage, allowing it to be used internationally without manu-
ally setting voltage switches. In addition, Intelligent AC also
suppresses high-voltage transients up to several kilovolts,
filters common mode and differential mode radio frequen-
cies (EMI), and sustains operation temporarily during low-
voltage periods.
Number of JM-1Ps that Can Be Looped with AC Power
Circuit Breaker/
Connector Rating
115 V AC 230 V AC 100 V AC
15 amps 2 looped
(3 total)
5 looped
(6 total)
1 looped
(2 total)
20 amps 3 looped
(4 total)
7 looped
(8 total)
2 looped
(3 total)
AC Cable Wiring Scheme
!
Blue = neutral
Brown = hot
Yell ow/ gr een =
earth ground
(chassis
!
!