I don't think we thought of the maths back in the 70s when the toshes were
about.
Of course it is hard at a show in a kind of plywood and chipboard box to
get good sound in the first place.
I was rather intrigued by the recently all the rage Sonos brand as they are
obviously self powered and wireless enabled but also have a system where you
use you mobile phone to tweak the frequency response to assumedly get a
good sound at the listening position. Does this really work or is it yet
another gimmick to justify their high cost?
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Phil Allison" wrote in message
...
Brian Gaff wrote:

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Well obviously cannot see the picture,


** That's way I provided a concise, verbal description for you.


As I say, they did need bass enhancement to really sound rich.


** As you fit more woofers to the same enclosure, the box resonance goes
up and up so to compensate the internal volume must also.

Having only 4 litres of enclosure per driver, the Bose 2201 likely rolled
of sharply below 110Hz and needed 12dB or more of bass boost at 50Hz to
sound flat.

But having 22 drivers makes low frequency efficiency quite high, over
100dB SPL per watt at a guess.


.... Phil