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Old 10th October 2001, 05:19 PM   #11
diyAudio Member
Join Date: Sep 2001
Evan, the best option for speaker protection is a relay. This relay protcetion has serveral advantages over fuse protection.
Disadvantages of fuses:
- Its difficult to determine the fuse rating because the speaker impedence varies with frequency and the type of enclosure.
- If an approximate fuse rating is used, it keeps blowing after a while and in many cases the speakers will die for the fuses.

Relay protection:
- Speaker is connected only when powersupply is available and this may include muting to avoid turn-on transients.
- If DC is detected it immediately disconnects the speaker from the amplifier.

Many kits are available for Speaker protection, you can try Velleman Kit K4700.

- XL.
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