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I will be teaching a physics of sound class in the fall and I
would like to get a good set of speakers/monitors and amp
system (has to be portable). Does anyone have any
recommendations? I have a CD that plays a sine wave starting
at about 20Hz and sweeps up to 20,000 Hz (I ask students to
raise their hands when they can't hear it anymore). I notice
the speakers I have don't respond until around 50 Hz - I
can't hear anything above about 10k Hz myself so I don't know
if the speakers I have go to 20 kHz or not.