JBL-drivers and distorsion

[Niklas Nord]

I´m interested in some graphs that illustrates the distorsion on
some drivers like;

2123
2012
2202
2206
2226
2242
2035

On the PDF´s in the JBL website there is some graphs, but i cant read out
the procentage distorsion values...

What JBL driver would have the lowest distorsion in the range 200hz - 3500hz ? NOT horn driver.

[Niklas Nord]

:blink: heeeelp....

[Robh3606]

It would probably be a good idea to tell us what you are trying to do. I would not use any of the listed drivers up that high. If you look at the 2012 spec sheet it tells you in the text what the distortion levels are and only over the target range of 100-1600 Hz. Have you looked at 2118's????

http://www.jblpro.com/pages/pub/components/2012h.pdf


Rob:)

[Niklas Nord]

But there is no information about distorsion on the 2118 PDF :(

[Earl K]

What's Up Niklas ?

Do your S9500(s) still not go loud enough ?

If that's the case, you might need to consider horn-loaded midrange as your next best option.

[Mr. Widget]

Hi Niklas,

What is your goal? It seems you want to put together a speaker system with a frequency response of DC to Light that can produce 140dB with less than 1% distortion.

Did I get the specifications about right? :D

Are you concerned about phase distortion, time alignment, group delay, or stereo imaging?


Widget

[Niklas Nord]

No, I´m asking for a friend. midrange between 200hz - 3500hz !
With ultra-low distortion ! no horn, just regular driver.
WITH ULTRA LOW DISTORTION !!!

i hate :barf: distortion

I will tell you all when I will replace the S9500 with something better :D
But I can´t see how there can be anything better though ! :blah:

[Maron Horonzakz]

Im sorry to tell you this..Nick..But threres no sutch thing as ultra low distortion in a single speaker. Its always tied to some thing else in its design. Semetricle field, shorting rings. surround types. under hung, over hung. mass rings. Thiel Small peremiters. cone materials. And how good you measure them on a givein day.:barf:

[Robh3606]

Why don't you go the clasic 4 way. But only in the sense of using a dedicated midrange driver over a narrow range. Either a 2122/2123/2012 will kick butt. Especially when used over a narrow range say 300-1.2-1.5K like the classic 4344/4344Mark 2 and 4348. All I can tell you is the vocals and clarity and instrument definition you can get out of a 2122/2123 operating this way is really stellar. Have no idea what the distortion numbers are but from the way they sound it has to be pretty good.


Rob:)

[lfh]

What's the application (SR, HiFi, main/nearfield monitors, ...)? How were the desired crossover frequencies determined (and are they really "engraved in stone")? What are the requirements in terms of sensitivity, acoustical output, directivity etc? What transducers will be used below and above in frequency?

If he must take the cone up to 3500 Hz, we're talking small transducers (unless it's SR on the cheap, but you said "ultra low distorsion"...). Furthermore, I suspect he can forget one of [200 Hz, 3500 Hz, low dist, JBL]...

[Niklas Nord]

HIFI -purpose 3-way loudspeakers

let´s say 300hz to 3500hz and under 1% distortion @ 100db

5mm of xmax minimum

this one from Seas does not compute :o: Not so smooth response,
and the distortion is to high.

http://ldsg.snippets.org/graphics/seas/e0016.jpg

http://ldsg.snippets.org/graphics/seas/e0016fr+imp.jpg
http://ldsg.snippets.org/graphics/seas/e0016dist.jpg

Maybe some of the drivers used in JBL monitors would work?

Some of you must agree it would be very very interesting to find a driver
that can be this great as under 1% @ 300hz to 3500hz @ 100db

5" - 8" driver perhaps...

[lfh]

The Excel series was my first thought, too. That seems to be one very fine driver, but of course it would be nice to see waterfall plots as well. Maybe 'Klang und Ton' have tested this category of drivers in the last couple of years?

[Earl K]

this one from Seas does not compute Not so smooth response,
and the distortion is to high.

Well, from those graphs ,, I see we have two different interpretations of what is a smooth FR or "acceptable distortion levels".

Looks decent enough to me - how does it sound ?

Anyone here ever heard this transducer ? :blink:

[Niklas Nord]

I´m interested to know if JBL has any better driver than the Seas driver !

[speakerdave]

The C500G cone midrange seems to work very well in the LSR32 from 250 Hz to 2500. It's now on the transducer list for $159 a pop.

David

[Niklas Nord]

Do you have any information about where to buy such a driver?
And, is there any datasheet PDF on this one?

[lfh]

Come to think of it: Perhaps the B&W 6 in FST (http://www.bwspeakers.com/index.cfm/fuseaction/products.techfeatures/ObjectID/3808A556%2D3AB8%2D11D4%2DA67F00D0B7473B37) mid is available as spare? If so, your buddy needs to look no further.

[speakerdave]

Do you have any information about where to buy such a driver?
And, is there any datasheet PDF on this one?
Hi, Niklas,

If you are asking about the C500G, perhaps you can buy it through a local JBL Pro dealer, or at
http://www.jblpro.com/
Customer Service>Parts Service>Parts List>Transducer List.

I have not found a spec sheet on this driver, but you can see its performance in the LSR32's on page 7 of the manual pdf. here:
http://www.jblpro.com/pub/manuals/lsrman.pdf

David

Edit: In the LSR32 the C500G is used to 2.2k, not 2.5.

Here is a pdf of the breakout, which will give you guidance on the crossover:

[Don C]

The 2012 graph is in here:
http://www.jblpro.com/pub/technote/tn_v1n24.pdf
2242 is in here (I think)
http://www.jblpro.com/pub/technote/tn_v1n22.pdf
2226 here
http://www.jblpro.com/pub/technote/tn_v1n18.pdf
Keep trying different number, maybe you will find more.

[Niklas Nord]

aha thank you !!

:)

I´m very interested in low low distorsion sound you see :blink:

[Zilch]

No more answers until you update your box-building thread with more pics. :D

[Surely, the sun has come up there by now....]

[Niklas Nord]

hello

well yes, but it´s soo sad I have to work now and can´t go there untill
some 5 weeks or something like that..

then there will be some updates and pic´s

[Ron K]

I have been using the C500G for several years now in the system in the house. I really like this driver and just set up another system using it in my sound room in the garage. This consists of 2 15" 2235 and 2215 LFs, C500G mids, 053ti on LSR28 waveguide. This is triamped at 250Hz. and 2.5KHz. Will post pictures later. These mids are incredibly smooth, detailed, and the low crossover freq. is beneficial. Kind of pricey ( I bought one last week at 159.00) but I like them that much. enjoy, Ron

[Niklas Nord]

Interesting, where do you buy those drivers?
Do you have any measurements of this driver?

I´m looking for a driver under 10" that has great
values up to some 3000hz !

[Ron K]

NIK, I have crossed it at 3K, but this has a kevlar cone and as such are limited in HF performance. I get the best transition at around 2.5K. The only response graphs I have seen are the ones already mentioned from JBL. Have not used with passive crossover, only active 24Db LR. Bought the first pair back when the LSR seies first came out and they have remained my favorite cone mid, for nearfield use. They also have 2.5 inch voice coil. Hope this helps answer what you needed. Good listening, Ron K