Yamaha HS8 (8") starts from 37Hz, and Behringer B2031A Truth (9") starts from 50Hz?

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spaceman5

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#1
Yamaha HS8 (8") starts from 37Hz, and Behringer B2031A Truth (9") starts from 50Hz?

Hi


The product page of Yamaha HS8 (8") specifies that its Frequency Range starts from 37Hz.
The product page of Behringer B2031A Truth (9") - with a bigger driver, specifies that its Frequency Range starts from 50Hz.

The B2031A's woofer is bigger than the HS8's..
So this makes me wonder:

Is the HS8 really providing lower frequencies than the bigger 9" B2031A?

Or

Maybe the B2031A is actually achieving lower frequencies than the HS8,
but Yamaha is presenting data that is slightly "improved"? (for selling purposes of course)


The thing is, that a Frequency Response graph is not presenting the data in a binary way.
The graph is not either 0% or 100% per each frequency..

When we go to the left part of the graph, the more we go, the graph starts to gradually go down..
So choosing the point (frequency) in the graph where we declare as a "stop" might be somehow flexible between mfrrs.


What do you think?

I do understand that different drivers are of different quality,
therefore it is completely possible for 1 smaller (but quality) driver to provide lower frequencies than another bigger (and less quality) driver.
So it is definitely possible..
But it is also possible that some manufacturers are more real with the results and specifications that they give,
while other manufacturers are more Marketing and Selling inclined..

So I would like to know the truth about the HS8 and the B2031A...


I hope someone here can solve this in a decisive way..


Thank you
 
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#2
There are a lot more things than driver diameter that go into bass extension. For one, enclosure design plays a large roll. Neglecting that, moving mass, suspension compliance, and come stiffness all play a roll in defining the mass corner and therefore bottommost extension of a driver. For example, there are a lot of 15” PA woofers that have a hard time reaching down to 50 Hz! There are a lot of experts on this site, one of which I most certainly am not, who can give you much more in depth information, but this should at least provide a starting point.
 
#3
Hi outfoxhyperion

Great explanation,
and yes, like I wrote, I understand that bigger diameter does not automatically mean that we will achieve lower frequencies.

But my question is more factual, specifically to these 2 models..

Did anyone here get to hear them both,
or did some measurements, that can tell factual and objective results?
Free from any selling bias, so we can then rely on it, unlike a product page that might be slightly "fixed" for selling purposes..
 
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#4
Depends on what definition is used for bass extension. -3dB point, -6dB point or -10dB point? These will all give different values.

Yamaha website says -10dB is used for HS8.

Behringer does not specify which, so might be -3dB, in which case that would make sense.
 
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#7
And these -3db or -10dB points (assumed in anechoic conditions in 4pi steradian space) all are not relevant with room acoustics considered. Note the EQ switches on these to attenuate bass in case you place them near a wall or in a corner. Room gain will allow many speakers to reach much lower into the 30's,
 
#8
xrk971 said:
Note the EQ switches on these to attenuate bass in case you place them near a wall or in a corner. Room gain will allow many speakers to reach much lower into the 30's,
Click to expand...
Hmm
Where can I read some info about room and placement of the speakers and their effect on them?
(I cannot change the shape of the room, currently, but I can change what's in it, and how it's arranged and distanced)
 
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