Operating instructions
CAL OPERATING INSTRUCTIONS
11
■ Burst Current — The maximum rms current during a
period of around one second. The Burst Current is used
as a rating for magnetic breakers. It is also used for cal-
culating the peak voltage drop in long AC cable runs
according to the following formula:
V pk (drop) = I pk x R (cable total)
The Burst Current can also be used to calculate the AC
looping capability of CAL.
■ Ultimate Short-Term Peak Current — A rating for fast-
reacting magnetic breakers.
■ Inrush Current — The spike of initial current encoun-
tered when powering on.
You can use the following table as a guide for selecting
cable gauges and circuit breaker ratings for the system’s
operating voltage.
The minimum electrical service amperage required by a CAL
loudspeaker system is the sum of the Maximum Long-Term
Continuous Current for each loudspeaker. An additional
30 percent above the minimum amperage is recommended
to prevent peak voltage drops at the service entry.
NOTE: For best performance, the AC cable
voltage drop should not exceed 10 V, or
10 percent at 115 V and 5 percent at 230 V. Make
sure that even with AC voltage drops that the AC
voltage always remains within the operating win-
dows.
ELECTRICAL SAFETY ISSUES
Pay close attention to these important electrical and safety
issues.
■ CAL requires a grounded outlet. Always use a grounded
outlet and plug.
■ Do not use a ground-lifting adapter or cut the AC cable
ground pin.
■ Make sure the AC power cable for the loudspeaker has
the appropriate power plug (on the other end) for the
area in which you will operate the loudspeaker. In addi-
tion, the AC power cable must be rated for the total cur-
rent draw of all loudspeakers looped from the power
source.
■ Do not operate the unit if its power cable is frayed or bro-
ken.
■ Keep all liquids away from CAL loudspeakers to avoid
hazards from electrical shock.
CAL Current Draw
Current Draw Model 115 V AC 230 V AC 100 V AC
Idle Current CAL 96 1.98 A rms 1.63 A rms 2.32 A rms
CAL 64 1.24 A rms 0.99 A rms 1.42 A rms
CAL 32 0.58 A rms 0.45 A rms 0.65 A rms
Maximum
Long-Term
Continuous
Current
CAL 96 8.3 A rms 4.2 A rms 9.4 A rms
CAL 64 6.1 A rms 3.1 A rms 6.9 A rms
CAL 32 3.3 A rms 1.7 A rms 3.7 A rms
Burst Current CAL 96 14.7 A rms 7.3 A rms 18.5 A rms
CAL 64 10.8 A rms 5.4 A rms 13.6 A rms
CAL 96 5.9 A rms 2.9 A rms 7.4 A rms
Ultimate
Short-Term
Peak Current
CAL 96 33 A peak 18 A peak 40 A peak
CAL 64 24 A peak 13 A peak 29 A peak
CAL 32 13 A peak 7 A peak 16 A peak
Earth ground
Chassis ground