It is the engineering ,and No they are not stock at all custom matched drivers to a low tolerence ,and cabinets that have a lot of vibration isolation materials and cabinet ,and Crossovers are
very optimized for the drivers parameters .that is what you are paying for. They have not been that successful just stuffing boxes.
very optimized for the drivers parameters .that is what you are paying for. They have not been that successful just stuffing boxes.