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Author Topic: JBL ASB6125  (Read 13900 times)

Joseph White

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JBL ASB6125
« on: January 01, 2011, 06:53:31 pm »

I have an application for some low profile, high output subs. I need to try to keep my sub array below 17" so they don't rise above stage level. I need to hit about 400 people with 110db or so. The venue is a long story that I don't want to get into.

Has anyone used or installed the JBL ASB6125 dual 15" subs? They fit my application perfectly on paper and the specs look very good. Since they are so new I will have a hard time getting a demo so I might have to buy them without hearing them. Any surprises I need to know about? Are they as punchy and powerful as they look?

I am open to other suggestions for high output subs the fit under 17".

Thanks in advance for you input.

Joseph White
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Joseph White
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Grant Conklin

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Re: JBL ASB6125
« Reply #1 on: January 02, 2011, 02:17:34 am »

Hello Joseph -

I don't have any experience with this particular JBL, but another possibility is the Fulcrum-Acoustic US212.  Similar specs in a much smaller cabinet:   https://docs.google.com/viewer?url=http://www.fulcrum-acoust ic.com/wordpress/wp-content/uploads/2010/05/Prod-Spec-US212- rev-3.pdf

What is the distance from the subwoofer to the farthest row that you want to hit with 110db?

Thanks,
Grant
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Caleb Dick

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Re: Mini
« Reply #2 on: January 02, 2011, 09:04:29 am »

Demo the Danley TH-Mini as well. One of the best tiny subs on the market in my opinion.
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Caleb Dick
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Adam Kane

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Re: JBL ASB6125
« Reply #3 on: January 02, 2011, 10:01:16 am »

Grund Audio has the LPB series subs that are all 17" or smaller and sound very good. Single 18", double 18", or double 12" options are available.

I've use the 2x12 and the single 18 and they both sound very good. If the 2x18 is anything like the single 18, they should rock as the single 18 I used had far more output than I thought possible from a box that size.

http://www.grundorf.com/index.php?Type=SOUN&Application= GTS
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Duane Massey

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Re: JBL ASB6125
« Reply #4 on: January 02, 2011, 09:51:48 pm »

Why does any manufacturer not include meaningful specs with their products? It's impossible to evaluate a speaker without real numbers unless you can actually demo one in a real-world environment.
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Duane Massey
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Grant Conklin

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Re: JBL ASB6125
« Reply #5 on: January 02, 2011, 10:09:57 pm »

Duane Massey wrote on Sun, 02 January 2011 20:51

Why does any manufacturer not include meaningful specs with their products? It's impossible to evaluate a speaker without real numbers unless you can actually demo one in a real-world environment.



I agree.  Fulcrum is making an honest effort by including "Nominal Sensitivity" (presumably the number you compare to less scrupulous manufacturers) and "Equalized Sensitivity" charts and graphs.  They also base their calculated max output on the AES rating of their speakers.

If Systune and Smaart files were available for download, one would be able to compare between manufacturers in much more meaningful ways.  

Grant
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Duane Massey

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Re: JBL ASB6125
« Reply #6 on: January 02, 2011, 10:34:35 pm »

Grant, the most useful item on their specs is the graph showing response in a half-space environment. What I don't see is how they claim 102db nominal sensitivity, unless this number refers to the highest level within the stated operating range.

Response graphs are much more informative to me than all the various sensitivity mumbo-jumbo that seems to be the norm. Power handling is useful, but no one talks about the actual effects of power compression, so you rarely see max output as a measured spec, but nearly always a calculated spec.

I know, bitch, bitch, bitch. Fulcrum is certainly better than most.
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Duane Massey
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Ivan Beaver

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Re: JBL ASB6125
« Reply #7 on: January 03, 2011, 07:46:08 am »

Grant Conklin wrote on Sun, 02 January 2011 22:09

If Systune and Smaart files were available for download, one would be able to compare between manufacturers in much more meaningful ways.  

Grant


Even then, there would be other "issues" at play in "the game".  Such as drive signal-was it a voltage or referenced to a wattage-based on a rated impedance?

How far was the measurement taked from the box?

Clearly stated half or whole space.

What is the 0dB reference? The rated sensitivity or something else?

Single box of a group of boxes and back calculated and presented as single box?

It is only when the manufacturer is trying to be honest (and not getting caught up in the "numbers" game) that you can start to really compare with a degree of accuracy.

Are they trying to show what the box REALLY does or what they "wish" it would do?
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Ivan Beaver
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Ivan Beaver

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Re: JBL ASB6125
« Reply #8 on: January 03, 2011, 07:47:49 am »

Duane Massey wrote on Sun, 02 January 2011 21:51

Why does any manufacturer not include meaningful specs with their products? It's impossible to evaluate a speaker without real numbers unless you can actually demo one in a real-world environment.

What would be your list of meaningful specs that you would like to see?
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For every complicated question-there is a simple- easy to understand WRONG answer.

Can I have some more talent in the monitors--PLEASE?

Ivan Beaver
dB Audio & Video Inc.
Danley Sound Labs

Caleb Dick

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Re: JBL ASB6125
« Reply #9 on: January 03, 2011, 08:18:06 am »

Frequency response and output at the level where 3dB of deviation from the norm occurs. It's the torture test Pat Brown does.

Also a frequency vs. time domain impulse taken at 4x the drive level of the above test.
Looking for max real long-term output, freq at that level, and how accurately it handles transients.

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Caleb Dick
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Why waste time with second best

Experience is something you get just after you need it
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