wdascenz
07-15-2006, 01:52 PM
A question to my brother JBL owners.
The 4311 has a simple crossover using 3-ufd and 8-ufd film capacitors. As I understand it these were sourced from IMB in California and measure better than anything I have in my bag of tricks that were candidates as replacements. My inventory of passive parts includes polyester (Mylar), polycarbonate, polyenthylene, and polypropylene capacitors suitable for use in high-current speaker crossovers.
Has anyone out there in JBL land found out what these are? They are encapsulated in a card-board tube with radial leads. Because of the way they measure (and sound) I suspect they are polystyrene capacitors. I am not sure IMB made anything else other than Mylar and polystyrene capacitors at that point in time. I am guessing they made polystyrene since they served as a supplier to military contracts.
Any information would be most appreciated. Thanks.
Walt
The 4311 has a simple crossover using 3-ufd and 8-ufd film capacitors. As I understand it these were sourced from IMB in California and measure better than anything I have in my bag of tricks that were candidates as replacements. My inventory of passive parts includes polyester (Mylar), polycarbonate, polyenthylene, and polypropylene capacitors suitable for use in high-current speaker crossovers.
Has anyone out there in JBL land found out what these are? They are encapsulated in a card-board tube with radial leads. Because of the way they measure (and sound) I suspect they are polystyrene capacitors. I am not sure IMB made anything else other than Mylar and polystyrene capacitors at that point in time. I am guessing they made polystyrene since they served as a supplier to military contracts.
Any information would be most appreciated. Thanks.
Walt