![]() ![]() For example a circular baffle of diameter 215cm will allow strong radiation down to 80Hz and below. When the drive unit is mounted on a baffle this distance is markedly increased. Yet bass did come out of this radio, perhaps not very deep bass but bass was present nevertheless! The answer, as I came to find out when I studied speakers rather more intently, is that frequencies are only cancelled when their half-wavelength exceeds the distance between the front and back of the drive unit. Table radios of the 1930 – 1950 era, such as this EKCO 75, used the deep,īakelite cabinet housing to act as an extended baffle, normally fitted with a ![]() How could an ‘open box’ possibly produce any bass? Surely the front and back waves would cancel each other out? Having been brought up in the hi-fi tradition of speakers in boxes I remember being horrified when I first discovered an old radio with a perforated back plate. If we look at the early history of loudspeakers, however, it is littered with, what we now call, open baffle speakers. With the exception of panel speakers like electrostatics, an enclosure and a drive unit seem inseparable. Peter Comeau explores the alternatives.į or as long as many of us can remember, loudspeakers have come in boxes, but that wasn’t always the case. When you think of a speaker, you think of a speaker in a box. Designing Loudspeakers - Part 15 Open Baffles and Bass ![]()
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