CAL OPERATING INSTRUCTIONS
13
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
encountered 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 the AC voltage always remains within the
recommended operating window—including voltage
drops.
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
addition, the AC power cable must be rated for the total
current draw of all loudspeakers looped from the power
source. The included power cable is rated for a
maximum of 15 A.
• Do not operate the unit if its power cable is frayed or
broken.
• 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 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
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 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 32 5.9 A rms 2.9 A rms 7.4 A rms
Maximum
Instantaneous
Peak
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
Inrush CAL 96 <20 A peak
CAL 64 <20 A peak
CAL 32 <20 A peak
Earth ground
Chassis ground
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