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 Understanding specs
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Joined: Jun 2003
Posts: 23
hobbyist
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OP
hobbyist
Joined: Jun 2003
Posts: 23 |
When reading specs of speakers for frequency response, what is the difference between:
Freq Resp +/-3dB (Hz)
Freq Resp +3dB/-9dB(Hz)
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Re: Understanding specs
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Joined: Apr 2003
Posts: 16,441
shareholder in the making
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shareholder in the making
Joined: Apr 2003
Posts: 16,441 |
Those specs specify the "margin of error" that the frequency measurements fall between. In other words, with the +3/-9 spec, the speaker is allowed to be as much as 3dB louder or 9dB softer than reference, while with the +3/-3dB spec the allowable range is 3dB louder and 3dB softer. You'll notice that the frequency range with the +3/-9dB spec is always larger (usually in the lower extension) than with the +3/-3dB spec. This is because the low end of speakers drop off more slowly than the high end.
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