Description This application is a continuation-in-part of an application, filed Jan. 28, 1998 under Ser. No. 09/014,700, now U.S. Pat. No. 6,038,326. BACKGROUND OF THE INVENTION The field of the invention relates to a loudspeaker including a compression chamber, a first electroacoustic transducer disposed inside the compression chamber, a horn and a second electroacoustic transducer disposed outside the compression chamber. U.S. Pat. No. 4,138,594 teaches a small dimension low frequency...