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RE: Attenuating Amplifier Output for Horn Speakers

Yes, well that's the idea isn't it? Magnetic force on the voice coil is proportional to current flowing through it given that the magnet structure delivers a fixed field. Current will be greater at lower frequencies given the inductive impedance of a coil and and low frequencies cause greater coil displacements than hi frequencies. A fuse or some sort of sophisticated current limiter should do the job. If you are a DIY guy try this - http://sound.whsites.net/project53.htm. Or if you want to buy something, try https://www.parts-express.com/eminence-d-fend-sa300-loudspeaker-protection-unit--290-683. Personally I would just experiment with fuses, starting with the smallest until I could hear my music at the level I like without blowing the fuse.

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