Home High Efficiency Speaker Asylum

Need speakers that can rock with just one watt? You found da place.

like already said Multiple drivers for each pass band.

If one driver has 87dB/2.83 volt sensitivity two will have 93dB, four will have 99dB sensitivity, eight will have 105dB sensitivity, so it's as simple as that...if your amp will drive a 1 ohm load. Assuming it won't then you have to use a combination of series and parallel wiring to keep the impedance within a useful range, and that means even more drivers.

OTOH with a large enough horn you can reach 30Hz with 105dB sensitivity with one driver.

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