[Arny Krueger]

wrote in message


Consumer reports used to test them when they did high
priced speaker systems.

This led to a lengthy lawsuit that Bose eventually lost on first
amendment-related grounds.

The had their usual graphs. You
also have to know how CR tests speakers. They play back
noise while they are rotated 360 degrees. I don't know if
anybody else does this.

Polar response curves are fairly common where loudspeakers are implemented
as technical tools, such as live sound. Lots of loudspeaker development labs
have turntables for rotating speakers while they are being measured.

If you understand this, one can make certain judgments.

Polar response is very important for predicting the performance of a
loudspeaker in a given environment.

The 901's after the series II's
have no internal damping, very BAD.

Not necessarily.

Its easy to add some.

Certainly Bose is not leaving it out to save the big bucks.

The overall response is fairly smooth, with peaking
around 300 Hz, and not much above 12 kHz.

Bose sort of broke ground by applying the theory that one can equalize a
system for flat response below the bass resonance, if the bass drivers have
enough linear excursion. It takes a lot of power, but these days clean power
is relatively cheap.