Speaker Frequency Range

Tom Campbell · From: Houston, Texas, USA

I am looking at a woofer speaker with a frequency range of 50 - 4000 Hz. Never seen this range presented this way. What does it mean bass to treble response?

b0b · From: Cloverdale, CA, USA

It doesn't tell you much, except that the speaker won't respond to frequencies below 50 Hz or above 4000 Hz. 50 Hz isn't great for a woofer, as human hearing goes down to about 20 Hz.

You can tell a lot more if they would show a frequency response curve in a graph. A response of 50 - 4000 Hz might be okay in a car speaker. I wouldn't use it for anything else based on that spec.
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Tom Campbell · From: Houston, Texas, USA

Thanks for the explanation Bob.

If 50Hz is the low range, then a 3.8Hz would be the high range?

I notice a Travis Toy double TT has a range of 50HZ to 3.8Hz.

Donny Hinson · From: Glen Burnie, Md. U.S.A.

What it means is that the speaker will usably* reproduce any sound between those two frequencies. But as b0b iterated, it does not tell us anything about the amount of relative output at any frequency in between those two numbers. For that information, we need something called the speakers "curve", which is a graphic representation of the amount of output across that 50-4000 Hz frequency band for a given input.

*A speaker may produce output above or below it's usable (rated) range, but that output is so low or distorted that it's considered useless.

b0b · From: Cloverdale, CA, USA

b0b · From: Cloverdale, CA, USA

When I wrote "A response of 50 - 4000 Hz might be okay in a car speaker. I wouldn't use it for anything else based on that spec", I was thinking of home stereo woofer, not guitar speakers. Instrument speakers are a different application entirely, response-wise.
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Tom Campbell · From: Houston, Texas, USA

Thanks again for the info.

I compared the "curves" of the double TT to the speaker I was looking at and there is a considerable visual difference.

https://celestion.com/productpdf.php?id=928

Stephen Cowell · From: Round Rock, Texas, USA

Often missing from these ranges is the criteria... the range means nothing unless you know the db that limits it. Sometimes it's taken for granted that it's +- 3db... I've seen +- 10db too. If it says 'woofer', it's probably not going to be that good for a full-range instrument unless crossed-over and/or combined with a tweeter.

The next big number in speakers is efficiency... generally given as db at 1watt, 1kHz. Anything over 98 is good... 90db/1w is home stereo territory. JBL's get well over 102db/w.
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George Piburn · From: The Land of Enchantment New Mexico

I think you are confusing the TERM Woofer - with, in this case, LoudSpeaker.

Yes a woofer is for the low end of a system, what I am getting in your description is;

Will this loud speaker sound good for a steel guitar amp?

The short answer is Yes. 50 to 4Kz is the range of a steel guitar and it's important overtones.

The TT and PF speakers are voiced for steel guitars.
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