From knutinh@stud.ntnu.no Sat Jun 05 03:29:12 2004
Subject:Re: More on the Clone Comparisons

I have been using leslies for some years and put some thought into
the process.

A Leslie is essentially a omni source at lower frequencies, just
like any closed cabinet loudspeaker. At higher frequencies, it is
probably more like a toroidal pattern (time-averaged). This means
that the "direct to reflected-sound ratio" is probably lower than
most conventional speakers. In other words, the room is more
important in shaping the sound than for conventional speakers.

It also means that in a band setting, all members should hear the
leslie only as a function of distance, not the angle. Moreover,
their frequency response should be more or less the same.

What if a keyboard monitor had an extra hf driver in the back,
playing summed-mono? For typical leslie patches this would better
simulate "time-averaged omni" sensation, and the drummer sitting
behind your amp would hear clearly organ and piano patches instead
of the muffled sound they are used to if no other monitoring is used.

For large, efficient keyboard amps, medium sized horns (one mono in
the back, two up front for stereo) should give loud clean
stereo+mono output above 2kHz at sensitivities of 95-100dB W/m

Coupled to a standard 12-15" PA woofer, the setup should be plenty
loud for any keyboard needs.

For smaller rehearsal/personal monitoring, using 3*6.5" coax drivers
at about 90dB sensitivity, possibly enhanced by a 10" woofer should
do the trick.

regards
K