Why do the Transparent One speakers use a passive radiator instead of a port like most of the other speakers on the market?

Actually the Transparent One speaker design did start out to be a ported system. However we ran into two difficulties. The first minor problem was that when playing very low frequencies we could hear port noise, or what is sometimes called "chuffing" from the air moving in and out of the port. There are a number of good port designs out there that can greatly reduce this effect with different port topologies but at some point it is always there even if it is just a little. The second problem was that in order to make the speakers the size we wanted and still play down to the legitimate low frequencies we wanted, the required port would be too large. The laws of physics wouldn't allow it. However, we found we could fit a correctly sized passive radiator in the small enclosure and produce the low frequencies we were looking for, so the passive radiator design won out.

 

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