LE-10 used up to 1000Hz.

[beppe61]

Dear Sirs,

I am setting up two 2-ways medium size monitors (i.e. woofer and horn).
The horns, that I already own, have a good response from 1000Hz up.
So I need a woofer able to go up to 1000Hz (the crossover is active with 24dB/octave slopes).
A friend of mine have a pair of 10" LE-10 to sell.
Are they good up to 1000 Hz ? or it would be better to look at a 8" ?
Any other kind suggestion about JBL woofers (vintage or new) able to go up to 1000Hz ?
As I said they will be cut at 1000Hz with a 24db/octave filter.

Thank you very much indeed.
Kind regards,

beppe

P.S. where can I find the LE-10's graph response (possibly with the indication of the point where it starts to become beaming)?

[alexkerhead]

zilch will probably have graphs and a better answer, but yes, those should be fine up to 2000Hz.

[beppe61]

zilch will probably have graphs and a better answer,
but yes, those should be fine up to 2000Hz.

Thank you very much indeed for your kind and valuable reply.
Maybe I was worrying to much about this beaming effect.
By the way can you give me your opinion about the LE-10 ?
Any other even better 10" candidate for the 40-1000 Hz range (I have already renounced to very low frequencies as my listening room is just 5x7 meters).
Thank you so much again.
Kind regards,

beppe
Italy

[Earl K]

- The whole le10 family ( alnicos & ferrites ) sound nice up to 1500hz , in my experience .
- Le111H woofers are the same as Le10H / they just have a black front frame instead of the brushed aluminum.
- You realize ( I hope ) that the le10 is an @ 89 db / 1 watt transducer .
- You'll be padding down your compression driver a good 16 db .


- Your "beaming" question needs to be put into some context.
- At the crossover point to the horn (or any other domed transducer ) / it's nice to match the horns directional characteristics to that of the woofers (in the transitional/crossover area ).
- This makes for a smoother transition from one transducer to the other.
- Therefore, you may want to consider raising your crossover point ( depending on the horndriver combo you have ) .



- You've been a member of this website since April.
- Therefore, by now I think you should know that these woofers are highly considered by virtually everyone who owns them.
-They have a nice deep coil winding ( for good Xmax ) / a 3" diameter coil winding / lots of coil length in the winding ( giving a decent BL figure which can be directly related to resolution ) / a nice application of Aquaplas ( to reduce harmonic disrtortions ) and on and on .
- The pertinent statistics ( including Frequency Response ) are outlined in the "Transducer" Forum .

Any other even better 10" candidate for the 40-1000 Hz range (I have already renounced to very low frequencies as my listening room is just 5x7 meters).

- No, IMHO, there's no better JBL 10" woofer ( that offers linear response in the 40 to 1000hz range ).

[beppe61]

-
The whole le10 family ( alnicos & ferrites ) sound nice up to 1500hz , in my experience .
- Le111H woofers are the same as Le10H / they just have a black front frame instead of the brushed aluminum.
- You realize ( I hope ) that the le10 is an @ 89 db / 1 watt transducer .
- You'll be padding down your compression driver a good 16 db.
Thank you sincerely for your extremely kind and helpful advice.
Actually I would like to use the compression driver (a 2") in unconventional way, mounted backwards and without the horn, like a normal dome mid-tweeter from 1000Hz up.
In this way the actual sensitivity of the driver should be reduced (I do not know how much anyway. I have to try this).
- Your "beaming" question needs to be put into some context.
- At the crossover point to the horn (or any other domed transducer ) / it's nice to match the horns directional characteristics to that of the woofers (in the transitional/crossover area ).
- This makes for a smoother transition from one transducer to the other.
- Therefore, you may want to consider raising your crossover point ( depending on the horndriver combo you have ) .
This is a very important point I was wrongly overlooking.
Unfortunately I do not have any graph response of the horn's driver.
At the crossover point then the dispersion of woofer and tweeter should match.
I guess this could be difficult to achieve.
Maybe I am misunderstanding, but shouldn't I have to lower the crossover point?
The directionality of the woofer should increase going up with the frequency so the mismatch should be greater at 1500 than it is at 1000 Hz. Am I wrong ?
- You've been a member of this website since April.
- Therefore, by now I think you should know that these woofers are highly considered by virtually everyone who owns them.
-They have a nice deep coil winding ( for good Xmax ) / a 3" diameter coil winding / lots of coil length in the winding ( giving a decent BL figure which can be directly related to resolution ) / a nice application of Aquaplas ( to reduce harmonic disrtortions ) and on and on.
- The pertinent statistics ( including Frequency Response ) are outlined in the "Transducer" Forum .
- No, IMHO, there's no better JBL 10" woofer ( that offers linear response in the 40 to 1000hz range ).
This is more than enough for me.
Thank you sincerely again.
I will look thoroughly at the "Transducer" Forum .

Kind regards,
beppe

[GordonW]

If you do the basic math, you can get a handle on the frequency that ANY 10" driver will start to beam. It's a dimensional thing, dependent on the diameter, more than any other factor.

For a JBL LE10, that frequency will be around 1600 Hz. So, using it up to 1KHz, 24 dB/oct. lowpass, will be absolutely fine. Should be no need to worry about dispersion problems, whatsoever.

Regards,
Gordon.