Frequency Response - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 4 Old Yesterday, 11:23 PM - Thread Starter
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Question Frequency Response

If a speakers "Frequency Response" is 85-5000 hz does that mean that the speaker blocks out the frequencies over and under that? Or do i need to set a high and lowpass filter around those frequencies? Thank you for any help.
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post #2 of 4 Old Today, 01:55 AM
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The frequency response of a full completed speaker is what it can reproduce, and is usually quoted with a +/- decibel rating, such as 55hz-20khz +/- 3db, meaning that within that range it won't deviate more than 3db in either direction. You don't have to use a filter if you want to run the speaker full range, but if you're adding a subwoofer for the low-end you'll likely want to have a high-pass for the speaker and a low-pass for the sub to properly blend them and relieve the speaker of reproducing the deep bass frequencies that the sub will carry.

The spec you listed however sounds more like it's for a driver than a finished speaker, I'm not aware of any speakers meant for home use that have such a limited range. If you're talking about a speaker driver that you're going to be using in building a finished speaker you'd need to have some sort of crossover at least at the top end to roll it off before cone breakup occurs, and another crossover at the low-end if you're going to integrate another driver to handle lower frequencies in your design.
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post #3 of 4 Old Today, 06:15 AM
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If it is in an enclosure it is probably a small tv or computer speaker meant for minimal sound volume or fidelity. Fine for the voice end of a sound system but not very good. About telephone sound quality..If it is a bare speaker it is a midrange and would require a higher frequency and a lower frequency speaker to produce any kind of fidelity.

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post #4 of 4 Old Today, 11:30 AM
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Quote:
Originally Posted by Jake Adams 2 View Post
If a speakers "Frequency Response" is 85-5000 hz does that mean that the speaker blocks out the frequencies over and under that? Or do i need to set a high and lowpass filter around those frequencies? Thank you for any help.
You said Speakers, but did you mean Speaker or did you mean Driver, as in a Bass Driver or a Midrange Driver?

And what other drivers are in the system?

How is the speaker being used? Stereo? Part of a Multi-Driver Speaker System? PA? Musical Instrument?

If that is a guitar speakers that is abut right. If that is a Bass Driver for a Stereo Speaker, it must be relatively small.

The application matters. If this is a single driver stand alone speaker, then it can be used as is. If this is one driver of a multi-driver speakers, then you need some type of Crossover or filter.

You simply haven't given us enough information for us to make a determination.

Also, speaker ratings and crossovers are not Brick-Walls. At the rated frequencies, the drivers starts to fade out. They roll-off, they don't just end.


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