I have noticed that some specs have this,
Overall Frequency Response 38Hz - 25kHz
Lower -3dB Limit 48Hz
Upper -3dB Limit 24kHz
What does the red ones mean? Sorry, this is al new to me... :o
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Thread: Frequency Response question
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11-07-2005 02:23 PM #1
Frequency Response question
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11-07-2005 02:37 PM #2
The red ones are real, the others represent areas where the speaker may be making some sound, but is no longer in a flat frequency response area. Typically you would only want to look at the -3db specs. Remember that the response curves are not neccessarily indicative of the quality of sound a speaker can produce.
There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
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11-07-2005 02:43 PM #3
It means that the amplitudes are 3 decibels lower than the average at those frequencies. As the decibels decrease the speaker is less effective at those frequencies and beyond. The number basically give you an effective operating range of the speakers.
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11-07-2005 02:46 PM #4
Generally (but not always) your "overall" response is measured at -10dB points. Still audible, but at less than a third of the output. The +/-3dB spec is popularly used because its thought to be threshold of hearing a difference in amplitude.
Last edited by steveinaz; 11-07-2005 at 04:19 PM.
Source: C.E.C. CD-3300 CD Transport
DAC: Benchmark DAC/PRE
Linestage: Placette Audio Passive
Power Amp: Parasound HCA-1500A
Speakers: Harbeth Compact 7ES-3 Monitor
Stop dissecting and start listening. - Steve in Arizona
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11-07-2005 02:48 PM #5
Isn't that where the fall off begins??
"SOME PEOPLE CALL ME MAURICE,
CAUSE I SPEAK OF THE POMPITIOUS OF LOVE"
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11-07-2005 02:54 PM #6
Technically a speaker should remain +/-3dB within its rated frequency response to be considered a fairly flat response. Of course none of this has much to with "real world" in-room response, unless your living room is the perfect environment.
Source: C.E.C. CD-3300 CD Transport
DAC: Benchmark DAC/PRE
Linestage: Placette Audio Passive
Power Amp: Parasound HCA-1500A
Speakers: Harbeth Compact 7ES-3 Monitor
Stop dissecting and start listening. - Steve in Arizona
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11-07-2005 04:15 PM #7
As always, you are all a great help! :D
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