Small cabinet loudspeakers with a flat response are quite inefficient. Assuming that the frequency responsecan be manipulated electronically, systems that have a non-flat SPL-response can provide greater usableefficiency. Such a non-flat design can deal with very compact housing, but, for small drivers, it would requirea relatively large cone excursion to obtain a high SPL. However, mounting the driver in a pipe, thecolumn can be made to resonate which enables the use of small drivers with a small cone excursion to obtaina high SPL. For these special loudspeakers, a practically relevant optimality criterion, involving the driverandpipe parameters, will be defined. This can be especially valuable in designing very compact loudspeakersystems. An experimental example of such a design is described and a working prototype is presented.
展开▼
