![]() Typical HiFi cone-to-magnet isobaric subwooferĭeveloped in the 1950’s by respected acoustic engineer Harry F. ![]() This design results in higher power handling, lower distortion, lower group delay, and requires half the enclosure volume for a given low frequency cut off as compared to a single non-isobaric vented design.Īs with all isobaric designs the drivers must operate in phase with each other, so in a cone to cone vented design each of the driver’s electrical drive signal is reversed to compensate for the reversed acoustic output. There are three basic types of isobaric designs:Īll three basic types can have many variations including venting the rear chamber, loading the front into a bandpass chamber, to date VUE has employed the cone to cone isobaric type with a vented rear chamber. This will in effect make all your speaker enclosures half as big as they would normally be for any particular driver. The modeling for a true isobaric design is essentiality identical to that of standard vented box only you would divide in half the Vas of the driver – the isobaric pair is in effect acting as a single motor with twice the magnetic circuit and moving mass. In the theoretical ideal the air chamber between the drivers should be small enough to virtually be incompressible – the diaphragms would act closely coupled, almost as if coupled together by a lightweight rod. ![]() ![]() Isobaric loudspeaker enclosure configuration refers to systems with two identical transducers operating simultaneously with a common enclosed air adjoining one side of each transducers diaphragm. ![]() Mike Adams early VUE ACM and Isobaric Design Meeting ![]()
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