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Seeking advice for buying home audio equipment
On Nov 20, 11:16 pm, Chris Hornbeck
wrote: Also to be noted is that the 3 dB efficiency gain of ported systems is really only applicable in the narrow range of the port's output. Not correct. Most importantly, the port does not ADD to the woofer's output over the narrow range, it REPLACES the driver's output over this narrow raange. But, more importantly, the 3 dB increase in efficiency is oft cited and equally often misunderstood. Taking any give driver and putting in a ported enclosure WILL NOT increase the efficiency of the system by 3 dB. The 3 dB results because, for a given enclosure volume and bandwidth, the driver used for a ported version CAN BE as much as 3 dB more efficient in the optimum case (maximum efficiency C2 sealed alignment vs maximum efficiency lossless B4 alignment results in a 3 dB increase in system efficuency). If you have a specific driver, your system efficiency is set, no matter WHAT enclosure you put it in. The issue is what type of enclosure, how big and what's the bandwidth that results. |
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