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Author Topic: d&b B22  (Read 7517 times)

Helge Dr. Bentsen

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d&b B22
« on: July 13, 2016, 03:07:38 pm »

d&b launched the B22 earlier this year.
http://www.dbaudio.com/en/systems/details/b22-subwoofer.html

Similar specs to the old B2.
Anyone heard it and can comment on it's performace against the B2?
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Josh Millward

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Re: d&b B22
« Reply #1 on: July 13, 2016, 07:14:14 pm »

Interesting...

I always wondered what the difference was between "normal" mode and "Infra" mode. I guess now I know!

That is one way to get the job done.

I, too, would be interested to hear the thoughts of someone who uses this product.
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Josh Millward
Danley Sound Labs

John L Nobile

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Re: d&b B22
« Reply #2 on: July 13, 2016, 11:18:19 pm »

Interesting specs in that the freq response is at - 5 db not - 3 or - 10. Also that the peak power has a time associated with it.
They're not exactly light but I think heavy is a good thing in a sub.
What's the price point?
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Ivan Beaver

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Re: d&b B22
« Reply #3 on: July 14, 2016, 06:59:15 am »

Interesting specs in that the freq response is at - 5 db not - 3 or - 10.
At least with a graph you can determine what the -3 or -10dB points are.

Now whether that graph is processed or not (it has to be on the infra mode) is another question.

Seeing a processed graph is pretty much worthless, unless you ALSO see the processing applied to get that graph.

I do like the way EAW did things on some models.  They show the unprocessed (The only really useful graph in my opinion), the processing curve and the final/processed graph.

That way you have something useful to determine if the product might be right for you.

The PROBLEM with a processed graph, is that in many cases there is a good sized boost added to the low end of the subs.

When that happens, they are NO LONGER applying 1 watt or 2.83V at those freq.

So whatever boost has been added-that same amount of dB MUST be taken AWAY from the maximum output ratings-at those freq.  Because the  levels will not "scale" up

Lets say a speaker has a rated sensitivity of 100dB and a power capacity of 1000 watts.  Since 1000 watts is a 30 dB increase-the maximum level will be 130dB.

HOWEVER-if a 10dB boost is added at the low freq, then at those freq, you can only get a 20dB increase in level.

So lets say that 30Hz is -3dB down (with the boost applied).  So that is 97dB.  Add 20dB to that and you get 117dB-NOT 130dB.  BIG difference.

So if you are "expecting" to be able to get 130dB at 30Hz, you will be sadly disappointed after you let out the magic smoke.

It IS important to understand what is going on when looking at specs-they may not always be as you want to "believe" they are.

Simple numbers result in WRONG answers.
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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
Danley Sound Labs

PHYSICS- NOT FADS!

Helge Dr. Bentsen

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Re: d&b B22
« Reply #4 on: July 20, 2016, 04:54:01 pm »

So it seems that no one has tried these yet?
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Marjan Milosevic

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Re: d&b B22
« Reply #5 on: July 21, 2016, 04:44:27 pm »

I fail to see how this is classified as INFRA.

Samuel Rees

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Re: d&b B22
« Reply #6 on: July 21, 2016, 10:56:01 pm »

I fail to see how this is classified as INFRA.

In infra mode it is 32-68... isn't that 'pretty infra?'
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Josh Millward

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Re: d&b B22
« Reply #7 on: July 22, 2016, 09:26:19 am »

In infra mode it is 32-68... isn't that 'pretty infra?'

I think the real point is that "Infra" mode does not actually extend the low frequency performance of the loudspeaker. It actually just reduces the more efficient high frequencies and pushes the LF cutoff down the slope a ways at the expense of maximum output.

Also, never mind anything below 30Hz... To me, when someone says "infra", I am not thinking 30Hz and up. I'm thinking 20Hz and below. Ergo, this sub does not really do "infra".

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Josh Millward
Danley Sound Labs

Will Cash

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Re: d&b B22
« Reply #8 on: August 03, 2016, 08:41:33 pm »

Anyone know the approximate cost?
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Josh Millward

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Re: d&b B22
« Reply #9 on: August 04, 2016, 09:41:04 am »

Anyone know the approximate cost?

You know how that old saying goes, right?

"If you have to ask, you probably can't afford it."

Hahaha!!! I'm just kidding.

In reality though, I have no idea what it costs. I'm sure it will be plenty though, plus you are required to buy their amplifier/controller to go with it.
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Josh Millward
Danley Sound Labs
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