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Discussion in 'Amps and Cabs [BG]' started by Wxp4759cb, Dec 22, 2001.
What are isobaric cabs, and what are their advantages/disadvantages?
A type of speaker enclosure used for subwoofers and bass drivers which uses a small, sealed enclosure with two bass drivers facing each other (one inside the box facing out and the other outside the box facing in at its counterpart) and wired out of phase. The primary advantage of this type of configuration is that the enclosure is small - about half the size of a sealed enclosure for the same output. The enclosure must be sealed and the two drivers must be sealed together. Isobaric enclosures leave one driver essentially hanging out in the open air making it a somewhat challenging configuration to achieve due to aesthetics and the need to protect the driver outside the box. This type of configuration is sometimes found in car audio but is rare in home theater and other home audio systems.
This will give you a general idea of Isobarics and other types.
The Isobaric can be mounted in a tube as shown above, or face to face, which is superior due to better heat dissipation.
The -6dB loudness loss plus the 2x cost for the 2nd driver is prohibitive.
Now THAT is a bitchen site. Thanks, bgavin.
This is the corollary site. It goes into the various types of Isobaric configurations.
yeah bgavin, good sites.