Don’t let your speakers go up in smoke, protect them with ERSE’s quality speaker protection devices. Choose from tungsten filament protection devices which track the music level dynamically, or polyswitches which cut out at the desired power. Neither device adds any appreciable resistance or distortion. The filament protection will gradually increase it’s resistance once the specified voltage is met, hence reducing the output to the driver. A polyswitches resistance will go infinite once it reaches the trip current rating, it will reset it self once it has cooled. Both provide adequate protection and are used frequently used by many OEM speaker manufacturers. Generally polyswitches are used in home hi fi applications where as filament type devices are used in high power pro sound applications.
AUDIO TIP: To protect and keep playing at the same time, put a resistor in parallel with your protection device. Once the device has tripped or it’s resistance has gone high such as a filament, the current will find the least path of resistance to ground. In this case it would be the resistor in parallel. The following chart will show you the db cut of the specified resistor value with an 8 ohm load. Note once a polyswitch has cooled, it will reset then current will flow back through the polyswitch, resuming the volume to the normal level.