1. Frequent occurrences of hard feedback

If you say "ouch" after that last feedback squeal, chances are your speakers were hurt too! Using the speakers after they have probably been damaged makes it worse.

2. Improper bi-amplification: crossover too low or tweeter amp too high

Always check your speaker specs for the best crossover points when bi-amping.

3. Not enough speaker systems for SPL requirements or proper coverage

Instead of using higher wattage with the same speaker complement for more SPL, add extra channels of amplification with additional speakers.

4. Trying to cover an outdoor gig with your indoor system

Outdoor gigs require at least 12dB (16x's the power) more sound output than indoors, and as much as 20dB (100x's power!) to really do it right.

5. Excessive EQ

The classic "smile" EQ curve is actually an evil grin for your speakers! Keep in mind that EQs are best used for cutting, not boosting the signal. Need more highs? Reduce the bass...need more lows? Reduce the highs.

6. Incorrect use of compressors/limiters

Excessive compression and limiting squeezes the life out of your music and your speakers!

7. Not enough amplifier headroom

If your amp has too little power (not enough headroom), clipping may occur, which will damage your speakers. (See the Power Amplifier Buying Guide for more details.)

8. Sudden transients while the speakers are hot

Transients are thumps caused by powering off and plugging/unplugging mics, etc.

9. Clipping the signal before it gets to the power amp

This is caused by improper mixer gain distribution, or a line signal that's too hot.

10. Continuing to Use Your Speakers After Damaging Them...

And failing to have the crossover parts checked for damage after abusing the speaker system by continued use. Let your ears be your guide. If you hear distortion from clean inputs, damage has likely occurred.