Coaxial speaker system having a compression chamber with a horn
Coaxial two-way or more loudspeaker system ( 1 ) comprising a low range electro-dynamic transducer ( 2 ) and a high range transducer ( 3 ) with compression chamber including a whole horn, mounted in a coaxial and frontal with respect of the low range transducer ( 2 ).
1. A coaxial ( 1 ) two-way or more loudspeaker system comprising a main electro-dynamic transducer ( 2 ) for the reproduction of low range and/or mid range frequencies, including:
a main magnetic circuit ( 4 ) defining a main air gap ( 17 ),
a moving part ( 22 ) comprising a diaphragm ( 23 ) fixed to a movable coil ( 24 ) diving into the main air gap ( 17 ), said movable coil ( 24 ) comprising a support ( 26 ) and a solenoid ( 25 ) winded onto the support ( 26 );
wherein the system further comprises a secondary electro-dynamic transducer ( 3 ) for high range frequencies, mounted in a coaxial and frontal position with respect of the main electro-dynamic transducer ( 1 ), received within a space limited backwards by a front face ( 11 ) of a pole piece ( 6 ) of the main magnetic circuit ( 4 ), and laterally by the wall of the support ( 26 ) of the movable coil ( 24 ) and including:
a secondary magnetic circuit ( 34 ) distinct from the main magnetic circuit ( 4 ) and defining a secondary air gap ( 47 ),
a moving part ( 48 ) comprising a diaphragm ( 49 ) fixed to a movable coil ( 50 ) diving into the secondary air gap ( 47 ), and a waveguide ( 76 ) forming a whole horn, mounted in the vicinity of the diaphragm ( 49 ), and having a face ( 80 ) facing and in the vicinity of the diaphragm and limiting a compression chamber ( 93 ), said waveguide ( 76 ) having a mouth ( 88 ) which extends further to a peripheral suspension ( 27 ) of the diaphragm ( 23 ) of the main transducer ( 2 )
wherein the secondary transducer ( 3 ) further comprises a fixed endoskeleton ( 52 ), and wherein the moving part ( 48 ) of the secondary transducer is mounted to the endoskeleton ( 52 ) by an inner suspension ( 66 ) disposed inside the diaphragm ( 49 ),
wherein the moving part ( 48 ) of the secondary transducer ( 3 ) is free of outer suspension outside the diaphragm ( 49 ).
2. Loudspeaker system ( 1 ) according to claim 1 , wherein the transducers ( 2 , 3 ) have coincidence, or almost coincident acoustical centers (C 1 , C 2 ).
3. Loudspeaker system ( 1 ) according to claim 1 , wherein the secondary transducer ( 3 ) is fixed to the main transducer ( 2 ) through its endoskeleton ( 52 ).
4. Loudspeaker system ( 1 ) according to claim 3 , wherein the endoskeleton ( 52 ) comprises a plate ( 53 ) fixed to the secondary magnet circuit ( 34 ), and a rod ( 54 ) fixed to the plate ( 53 ) and through which the secondary transducer ( 3 ) is fixed to the main magnetic circuit ( 4 ).
5. Loudspeaker enclosure ( 95 ) including a coaxial loudspeaker system ( 1 ) according to claim 1 .