Anyone knows CEA measurements of JBL ES250? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 9 Old 10-04-2018, 01:07 PM - Thread Starter
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Anyone knows CEA measurements of JBL ES250?

Years ago I had sub JBL ES250. Specs: 12" 400W 25hz (-3db).

Until it broke down, it was a sub with a big kick in the ass in the midbass. Excellent impact.

Anyone knows measurements (since 20 to 100 hz) of this old subwoofer?

When I wrote to JBL, they answered me:



Quote:
Our power output spec for this model is not listed as a CEA conforming specification but we do provide some details about our measuring criteria for Dynamic power.

Amplifier Power (RMS) 400 Watts
Peak Dynamic Power 700 Watts (the Peak Dynamic Power is measured by recording the highest center-to-peak voltage measured across the output of a resistive load equal to minimum impedance of the transducer, using a 50Hz sine wave burst, 3 cycles on, 17 cycles off)

These are the only specifications we have available for this model.
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post #2 of 9 Old 10-04-2018, 02:47 PM
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What do you plan to do with this information if you get it???
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post #3 of 9 Old 10-04-2018, 04:05 PM
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You have to know that the CEA-2010 measurements take time to do and the people who do them don't do it for free. Besides, someone (either the manufacturer or an owner of the sub) would have to cover shipping both ways.

Without the CEA-2010 measurements, the marketing department will have all the creative freedom. This is the reason not many manufacturers are into this.

Speakers: L/C/R: JTR Neosis 212HT. Surrounds: Jamo C103, KEF Q100, Polk Audio RTiA3.
Subwoofer: JTR Captivator 4000ULF.
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post #4 of 9 Old 10-11-2018, 06:03 AM - Thread Starter
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well... JBL no. But it´s possible that some person have measurements of this old subwoofer.

It would be interesting to know what SPL has between 50-100 hz (midbass).
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post #5 of 9 Old 10-11-2018, 09:05 AM
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Quote:
Originally Posted by subwoofer40 View Post
well... JBL no. But it´s possible that some person have measurements of this old subwoofer.

It would be interesting to know what SPL has between 50-100 hz (midbass).
Again, what do you plan to do with this information if you get it???
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post #6 of 9 Old 10-13-2018, 10:01 PM
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post #7 of 9 Old 10-13-2018, 10:26 PM
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Quote:
Originally Posted by subwoofer40 View Post
It would be interesting to know what SPL has between 50-100 hz (midbass).
Sensitivity? Or maximum output? Those measurements are useless unless you are comparing to other subwoofers measured BY THE SAME PERSON in THE SAME SETUP. Otherwise, everyone measures in different spaces using different equipment, sometimes smoothing, and sometimes they add "room gain" or other nonsense
--> You simply cannot compare such specifications from different companies.
Sorry, but true, that has been my experience as a loudspeaker engineer visiting many different factories etc. Now, if you can find the sub in a database all made by the same person with the same equipment in the same measuring space, only then can you make any comparison. I don't see such with your model in it

As @blacklight ing said, why do you ask about this? What are you trying to do? Replace the subwoofer with similar?

My take on the JBL measurement is they have a very solid 400 "real" watts amp inside.
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post #8 of 9 Old 10-14-2018, 08:41 AM
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https://www.avsforum.com/forum/113-s...aine-list.html

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post #9 of 9 Old 10-15-2018, 01:53 PM - Thread Starter
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Quote:

what do you plan to do with this information if you get it???
Information. Because I had that subwoofer and it had a lot of kickbass.
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