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FaitalPRO 4FE35 4" Professional Full-Range Woofer 8 Ohm
I want to put 16 of these in a line array column. Assuming a 48db/Oct L-R HPF is used, what's the lowest xover point that can be used to keep the full 30/60w power rating in either a sealed or ported box? Thanks.
A sealed box will be the most practical here, being about 1.7 cubic feet. The lowest I would recommend would be 150 Hz where the drivers reach excursion limits with full RMS power. 200 would be even better.
Date published: 2015-06-16
For a skinny column array of 8 drivers, what volume and port size is required? What would be the combined efficiency?
I would recommend a high output type design which is 1 cubic foot total, with one 4" diameter, 1" long port for a tuning frequency of 85 Hz. In order to get the most from these drivers, a high pass filter is recommended at 80 Hz. The total sensitivity with the drivers in series/parallel will be 93.8 dB 1w/1m, 97.7 dB 2.83v/1m.
Date published: 2014-10-13
If I use the suggested vented box size, how big should the port tube be?
With that volume I would recommend a 1-1/2" diameter, 1-3/4" long port.
Date published: 2014-09-23