Design Theories: Isobaric - Dual Drivers
| Isobaric - Dual Drivers | |
| Basic Theory | |
| Two drivers are mounted together in an enclosure with a cavity of air between the two drivers. The drivers must operate in phase with each other. The cavity of air between the drivers should be made as small as possible without compromising the operation of either driver. The modeling for this type of enclosure is done just as you would any other speaker enclosure except you take the Vas of the driver and divide by 2. This will in effect make all your speaker enclosures half as big as they would normally be for any particular driver. | |
| Advantages | |
| Improved sonic bass response. Bass is claimed as being tighter, faster, more accurate and more pure. Vas of the driver is cut in half. The volume of enclosure required to obtain a specific frequency response can be achieved in only half the volume. This is where isobaric enclosures have their biggest advantage. | |
| Disadvantages | |
| Wasted amplifier power to driver the internal sub. Efficiency of the system is down 3 dB as compared to a single driver due to the added cone mass and the reduced Vas. When you compare isobarics to a system which houses two drivers each in their own enclosure, this system wis actually 6 dB less efficient. | |
| Best Applications | |
| Where size is a big issue. When you want the box to be very small. Where more accurate bass is more important than lots of bass. If you have a hefty amplifier with plenty of juice to spare and a driver that can handle a good amount of power. Suited for music, home theater and car. Not used too often these days. | |
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Source: www.danmarx.org
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