Am achizitionat o pereche de boxe englezesti,confectionate in anii 60.
As dori sa ma ajute cineva cu inlocuirea condensatorilor din filtre, dupa atatia ani banuiesc si-au pierdut din randament.Poate aveti alte sugesti pentru filtre,scheme ,valori etc.
Atasez mai jos poze si rewiuri despre ele precum si parametri tehnici,cu mentiunea ca nu cunosc valorile celor doua bobine si nici a rezistentei :
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*Famous original version of the H. J. Leak "Sandwich" Loudspeakers with HUGE AlNiCo (Aluminum Nickel Cobalt) magnets on the tweeters, and heavily damped and braced cabinets. The cabinets are in good condition with minor marks, and with a little re-finishing they would be absolutely gorgeous! Grills are in good shape too with very minor snags and badges in place. Woofers have cambric/fabric surrounds which will never need replacing, but a re-alignment should be considered (about $30 each). These are LARGE "book-self speakers" at 26" tall x 15" wide x 12" deep, and 45 pounds each. They are my daily listeners, and I'm only selling to fund another speaker project.
**Description: This model Sandwich loudspeaker is a two-way acoustic suspension system with a 13-inch woofer and a 3-inch tweeter crossed over at 900 Hz. The speaker cabinet is damped and sealed at a volume of approximately 2 cubic feet. The cabinet walls are very heavily damped as well, according to the sandwich principle with a thick bituminous lining. The magnet of the woofer is rigidly attached to the rear wall of the cabinet for increased cabinet rigidity.
The system crossover frequency was 900 Hz. The treble unit was approximately 3 inches in diameter and also featured a sandwich diaphragm (although early units appear to have had a fibre-cone tweeter).
The loudspeaker cabinet for the Sandwich system featured some novel design features also. The cabinet walls were only 12mm thick, but were very heavily damped with a similar thickness of bituminous lining. The magnet of the woofer was rigidly attached to the rear wall of the cabinet, thus increasing cabinet rigidity.
Leak had considerable success with the Sandwich loudspeaker, with it being used extensively in the professional audio industry and in homes both in Britain and overseas.
Astept parerile voastre,multumesc!!