As with everything though, there is a compromise. This means that for a given input power of another design (such as infinite baffle or bass reflex) they will produce more audio output power. Horn loudspeakers are relatively efficient, as they allow the loudspeaker to couple to the impedance of the air much more effectively. Despite their small size, they are a good match for the horn as they have a considerable maximum excursion and can deal with the high pressure within the horn. The design I chose was a Dual Table Tuba with 2x 8' JBL GTO 250W RMS bass drivers, which had the compatible Thiele-Small parameters and were widely available at the time. The subwoofer itself is a design by Bill Fitzmaurice who sells plans for a selection of loudspeakers вЂ“ mostly horns. The subwoofer in-situ though I now keep it on its side. The PA2 is currently fed by a Musical Fidelity v.90 DAC, though will soon be joined by another project of mine that IвЂ™m yet to write up which is a microprocessor controlled balanced input selector/attenuator. One amplifier powers both subwoofer drivers, whilst the other powers my Mission SX2 loudspeakers. IвЂ™ve now paired it with a DBX Driverack PA2 to do the crossover and DSP, together with 2 Crown XLi 1500 PA amplifiers. ItвЂ™s approximately the size of a refrigerator, and will happily produce bass that can distort your vision! The subwoofer in my lounge A few years ago I built a massive folded horn subwoofer that now lives in our lounge.

Horn subwoofer plans