Thanks rickdohc, a nice find! Sounds like a tried and tested formula like JVC likes to use. Wood, Brass, now Carbon and Kelton they seem to take legit stuff to incorporate. Cool how they attempted to take this system and miniaturize it. The whole copy and paste...
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The Kelton subwoofer design
incorporates an active and passive speaker in one ported enclosure. It differs from other passive radiator speakers in that the active speaker is sealed in its own enclosure, rather than sharing an enclosure with the passive speaker. When used as a subwoofer, this design attempts to combine the advantages of several speaker types in a supportive way.
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A speaker mounted in an airtight enclosure creates a damping effect through changes in air pressure in the sealed space. As the speaker moves forward, low air pressure behind the speaker pulls it back. When the speaker moves back, high air pressure pushes out. This type of design offers fast transient and smooth responses over a wide range of frequencies. It comes at the cost of efficiency, however, as none of the sound energy created by back movement of the speaker is released into the listening area.
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Ported speakers are inherently louder than sealed designs at the same power level, because the sound energy within the speaker cabinet escapes. The port is tuned to a particular frequency determined by the speaker designer to support the needs of the system. Below the tuned frequency of the port, response drops off quickly. As consumers generally respond to "loud" being better, most commercial speakers and subwoofers offer a ported design.
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The output of the active speaker combined with the resonance of the outer enclosure's tuned port causes the passive element to move in sympathy with the changes in audio signal. This effectively creates an outer enclosure of varying size, complimentary to the audio signal, restoring some response to low end of the ported enclosure while taking advantage of the smooth response and tight transients of the sealed active speaker. Overall, the system is tuned, without a crossover, to a range, or band, of frequencies, hence the "bandpass subwoofer" description.
Read more: What Is a Kelton Subwoofer? | eHow.com http://www.ehow.com/info_12154612_kelton-subwoofer.html#ixzz29gozZzby
Very ambitious endeavor. Again, to makes this work best and be most cohesive is where the higher version is better with the brass and better cable. Brass is a better enclosure for the woofer. Yamaha was originally going to use the "same brass used in their horns" to make the EPH-100 but they cheaped out with aluminum.
Other than being quite large, they look pretty awesome. Looks like an FXZ200 could be on a few Christmas(late Nov. release) lists including mine.
Edited by jant71 - 10/18/12 at 3:03pm
