 Romy the Cat wrote: | | Scott L wrote: | | the last time I checked, you were using 6each
@ 10 inch low frequency drivers per side. That's "getting there" but
still not enough to produce an acoustical watt. (which horns CAN do). |
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I am not sure what you mean. At the times when I
used 6 driver line-arrays for sub 100Hz region it was integrated with 115Hz upper
bass horn and I assure you that both integration and overall sound were very
fine. I do not think that it would work in larger or non-sealed room however
but it worked very well in there, I think it was ~300 sq feet. So, I do not
know what you mean saying “not enough to produce an acoustical watt”. In that room ANY design of midbass horn would
be a disasters. |
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My guess is was referring to the pressure levels at the surface of the woofer(s) compared to that of a horn. The sound pressure of a direct radiator has to be much high to achieve a certain SPL at the same distance of a lower pressure horn.
It is a phrase more commonly used in pro-sound circles. Typical direct radiator types are only capable of producing ~3 acoustical watts for every 100 electrical watts input.
One acoustical watt is ~107 db from an OMNIdirectional source.
I haven't done them math to see how your array compares, but I can surmise that Scott is suggesting that your particular implementation in that room was not up to the task of orchestra, which is considered to be ~1 acoustic watt in power. Probably OK for rock though.
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