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Author Topic: "True sub"  (Read 9506 times)

Jacob Shaw

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"True sub"
« on: June 23, 2015, 12:51:38 pm »

Name all of the 18" transducer models new and old that are concider for to be a "true subwoofer".
I'll start:
Jbl 2245
Jbl 2269
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Ivan Beaver

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Re: "True sub"
« Reply #1 on: June 23, 2015, 08:51:59 pm »

Name all of the 18" transducer models new and old that are concider for to be a "true subwoofer".
I'll start:
Jbl 2245
Jbl 2269
The term "sub" simply means "below".

So below what freq?

There is more to consider than simply the woofer.  The cabinet has A LOT to do with it.

Then there is output SPL at some freq that is considered "sub".

Every loudspeaker ever made, EVERY SINGLE ONE, can EASILY reproduce 1 Hz.  With no problem.  So every speaker could be considered a "sub", even HF drivers.

Now how LOUD it is, that is a completely different story.

What is loud in a small room may barely be heard outside at a distance.

A home theater 8" sub may be able to reproduce 20Hz easily and flat-but would be worthless at an EDM show for 20,000.

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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!

George Dougherty

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Re: "True sub"
« Reply #2 on: June 24, 2015, 12:40:29 am »

A home theater 8" sub may be able to reproduce 20Hz easily and flat-but would be worthless at an EDM show for 20,000.
That's easy Ivan, you just bring 20,000 of them...  ;)
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Ivan Beaver

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Re: "True sub"
« Reply #3 on: June 24, 2015, 07:48:52 am »

That's easy Ivan, you just bring 20,000 of them...  ;)
Except for the fact that you can't keep on "piling up speakers".

You start running into limitations-such as physical size-time arrivals (read cancellations) and so forth.

It is FAR better to use a fewer number of quality speakers than more "wimpy" ones.

Not something that manufacturers want you to hear-but it is the truth.

What people would "like" to happen with sound is often NOT the reality of what really happens.

Hence the need to look a bit deeper into what is REALLY going on.
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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!

Jacob Shaw

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Re: "True sub"
« Reply #4 on: June 24, 2015, 03:15:03 pm »

Well I have read on this forum that this and that driver is not a "true sub", and that the JBL models I mention are "listed as a true sub" so I am asking what else is broadly considered to be a true sub professional driver.  From looking at the specs I am assuming it means a low fs and a large Xmax.
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Jeff Bankston

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Re: "True sub"
« Reply #5 on: June 24, 2015, 03:53:09 pm »

i dont use my woofers as subs. i cross my 18" , 15" , 12" woofers at 130hz. i cross 12" and 10" low/mid speakers at. i never allow the low/mids to go below 130hz and i get a little better low/mid clarity. i also use high quality drivers to begin with.
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Jacob Shaw

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Re: "True sub"
« Reply #6 on: June 25, 2015, 09:13:02 am »

i dont use my woofers as subs. i cross my 18" , 15" , 12" woofers at 130hz. i cross 12" and 10" low/mid speakers at. i never allow the low/mids to go below 130hz and i get a little better low/mid clarity. i also use high quality drivers to begin with.
What on earth does that have to do with this thread?
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Scott Harris

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Re: "True sub"
« Reply #7 on: June 25, 2015, 01:35:48 pm »

Can a person derail a thread that never started?  :-)
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Tim Weaver

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Re: "True sub"
« Reply #8 on: June 25, 2015, 01:54:34 pm »

I like to crossover my drivers too.


Cool story Bro
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Bullwinkle: This is the amplifier, which amplifies the sound. This is the Preamplifier which, of course, amplifies the pree's.

Jeff Bankston

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Re: "True sub"
« Reply #9 on: June 25, 2015, 02:44:15 pm »

What on earth does that have to do with this thread?
figure it out. and while your at it tell me what a true sub is. there is no one answer for the question.
« Last Edit: June 25, 2015, 02:46:33 pm by Jeff Bankston »
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