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Audio and Video Talk
General Discussion
Amp just fried my speaker - OR what just happened?
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<blockquote data-quote="pwatts" data-source="post: 1165451" data-attributes="member: 146"><p>Bridging is done by taking one channel, usually Left, inverting it and feeding it to the second amplifier; ignoring the Right input connector. The positive output of the Right amplifier is therefore inverted from the Left. Connecting the speakers to the positives of Left & Right therefore gives a signal doubled in amplitude and therefore 4x the power. The connections on the pic are therefore correct.</p><p></p><p>A dodgy bridging switch as mentioned by dan dudette might harm the amp but what puzzles me is why the woofers melted silently. Either DC or massive ultrasonic noise are usually the culprits, but for DC the drivers would have sucked in / pushed out and for ultrasonic the tweeter would have been the first to go due to its lower power handling and the woofers having filter inductors plus its own voice coil inductance. So a silent melt is really strange.</p></blockquote><p></p>
[QUOTE="pwatts, post: 1165451, member: 146"] Bridging is done by taking one channel, usually Left, inverting it and feeding it to the second amplifier; ignoring the Right input connector. The positive output of the Right amplifier is therefore inverted from the Left. Connecting the speakers to the positives of Left & Right therefore gives a signal doubled in amplitude and therefore 4x the power. The connections on the pic are therefore correct. A dodgy bridging switch as mentioned by dan dudette might harm the amp but what puzzles me is why the woofers melted silently. Either DC or massive ultrasonic noise are usually the culprits, but for DC the drivers would have sucked in / pushed out and for ultrasonic the tweeter would have been the first to go due to its lower power handling and the woofers having filter inductors plus its own voice coil inductance. So a silent melt is really strange. [/QUOTE]
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Audio and Video Talk
General Discussion
Amp just fried my speaker - OR what just happened?
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