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Re: [Phys-L] Suggestions for audio speakers




On 2013, Mar 11, , at 07:20, "Forinash III, Kyle" <kforinas@ius.edu> wrote:

Hi

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.

Thanks
kyle

For what is your intended use?

Rich physics in the design of speakers and their enclosures - the best Hi-Fi system I know of included feed back with microphone integral to the speakers; feedback from the microphone to the input of the power amp. in addition to "regular" amp. feedback. Used 6BL7s as is a very linear tube (vertical deflection amp. and oscillator use is a double triode).


bc discloses he worked for the engineer who won the prize at the Las Vegas consumer electronics show for that system, ca 1956.

p.s. I think kloss' systems included bass boost to compensate for the usual speaker bass roll off. My Cambridge sound works radio includes it, As did perhaps the model 8 (KLH predecessor) I bought for my mother.