[Arny Krueger]

http://www.music.miami.edu/programs/.../chapter_4.htm

"Yamaha 01V mixing console provided pre-amp gain for the self-powered
loudspeakers and headphone amplification for the headphones. The
studio-quality Genelec loudspeakers have a free-field frequency response of
55 Hz - 18 kHz (± 2.5 dB). This on-axis (0° ) plot, along with off-axis
plots of 15° , 30° , and 45° along with the 1/3 octave power response is
shown in Fig. 4.1. The off-axis characteristics of the loudspeaker display a
smooth and well-behaved transition. Their harmonic distortion at 90 dB SPL
at 1 meter was specified at 3% for 60 - 150 Hz and 0.5% for 150 Hz.
The loudspeakers incorporate a waveguide on the tweeter, which focus
dispersion and aids in minimizing unwanted first-order reflection
contributions in the sound heard in the listening position."

"The listening test was implemented by a randomized arrangement of A, the
unfiltered test signal and B, the all-pass filtered test signal as AA, AB,
BA, or BB. The synthesized test signals were presented in mono and acoustic
test signals in stereo. The test subject was free to adjust both headphone
and loudspeaker levels for each test signal to comfortable levels. The
randomized presentation order of the test signals was different for the
headphone and loudspeaker test implementations. Care was taken regarding the
onset portion of the test signals, which perception of timbre is highly
dependent on, were audible by the subjects. A 'blank' time of 50 msec
duration was placed in the beginning and between all test signals except for
the jazz vocal, which received 500 msec. The longer 'blank' time was
determined necessary for the relatively long and complex jazz vocal test
signal to facilitate phase distortion detection."