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Good point with the math explanation. I think the
effectiveness in a band setting comes down to how many
of the guitar frequencies are left after the battle
with the bass player for low frequency turf? British
60's bands were able to rock the house with 30 watt
Vox ac30's because they were because of the way
they're voiced. -dave
--- Gavin Ehringer <>
wrote:
>
>
> In an earlier post (below), Dave Wronski points out
> that four 10" speakers push more air
> than a Showman with a single 15". If I understood
> him right, this is correct, but not by the
> factors he noted - if you consider the area
> dimensions of the two speakers, it's actually
> 314 sq. inches for each 10" and 706 sq. inches for
> the 15". So, four 10" speakers push
> 1,256 sq. inches versus 706 sq. inches for the 15".
> However, if you are talking about 2 15"
> speakers (Dual Showman cab), it's a whopping 1,412
> sq. inches!
>
> Furthermore, these are the flat dimensions of a
> circle - you actually need to calculate
> these as conical area, which would be much greater
> (for that, however, you need the actual
> depth of the cones as well). Given the great depth
> of the 15" cones, you could fairly say
> that you move much, much more air with the two 15"s.
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