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LA Series lightning protection for speaker lines. Equipment installed outdoors provides an attractive path for grounding lightning. Different LA Series models are best for different wattage and impedance applications. LA 100 for 70 volt speaker systems.
(Note: The LA Series components were previously labeled as PHC Series.)
Equipment installed outdoors provides an attractive path for grounding
Speakers mounted in stadiums, on light poles, on tops of buildings or on the ground have conductors that are probable targets.
Damage need not come from a direct strike.
Lightning near an audio line can induce high current and cause catastrophic damage to equipment.
Protecting such equipment is simple and inexpensive with the LA Series of
Each LA model is designed to protect two pairs of audio lines, each with a maximum 5 amp capacity -
guarding against surges up to 5,000 amps with a response time of under 1 nanosecond and very low impedance of only 0.02 ohms.
Larger current loads, up to 10 amps, can be accommodated by bridging the terminals and restricting installation to one pair of leads per LA module.
The LA surge protection circuitry features a hybrid, three stage design that
includes fast acting MOVs, inductors and
silicon avalanche diodes (SAD).
A gold plated circuit card mates with the PCB-1B base (priced and sold separately) to allow easy replacement of the protection module on a periodic basis,
or whenever necessary following a significant lightning event.
LA Model Selection
LA Series surge protectors are available with clamping levels (the voltage at which the unit begins to divert current) from 15 volts to 150 volts.
The appropriate LA model is a function of the impedance and wattage of the speaker being protected.