Jbl 10" vs le5 mid range

[bldozier]

hello, I'm deciding on a speaker to be used from 200 ~ 1000kHz crossing over to a 2" horn at 1kHz,
I've read the 2105/le5 is a strong performer from 150 ~ 1000kHz, but how does the sound compare to
the larger brother driver le10,

could a 112/2108 be used from 200Hz. the driver is rated 4, 400Hz crossover.

because of the units i have collected so far i was thinking of a pair of dual le10/pr10 cabinets ( 2 le10 & 2 pr10 per cabinet L/R )
using and active network to control them crossing over at between 150 ~ 320Hz... with the use of a 15" sub tucked away in a corner somewhere.

please advise.

[Robh3606]

Hello BD

I would look at how JBL used them in their 3 way systems as far as crossover points. They were used as mid's crossed over around 1k. That is a very small cone to support a crossover point that low. They were used in a vocal PA box but in multiples not as single drivers. You can't expect that driver to keep up with a 2" CD and your polar response will be awful at crossover.

Rob

[bldozier]

http://www.audioheritage.org/vbullet...nded-Range-LE5

Hello BD

I would look at how JBL used them in their 3 way systems as far as crossover points. They were used as mid's crossed over around 1k. That is a very small cone to support a crossover point that low. They were used in a vocal PA box but in multiples not as single drivers. You can't expect that driver to keep up with a 2" CD and your polar response will be awful at crossover.

Rob

superb rob.

i did want to interject the le5 would have been used in a multiple configuration, not a single as suggested, i remember seeing a quad array the 4375 it was a box offered by JBL i think, that was in fact a pa system.

the points for it are rated 150Hz~15kHz...

could you comment then how the 8" le8 or 2115, would stack up to the le10.
brian

[Robh3606]

could you comment then how the 8" le8 or 2115, would stack up to the le10

Hello Brian

I have no direct experience with either driver. The only 8's I have used are the 108H, 2118, and 2108. The 2108 would most likely be the closest with a 3" coil and it's a beast! Sounds great over the 2-300Hz to 1K range. The 2108 is very close to a 2122 which is a really nice mid driver used in the 4344/45 I would go with the 3" coil in the LE10 and you have a nice damped cone. That is real close to a 2121 4340/41 just with additional mass to lower the FS

Rob http://www.audioheritage.org/vbullet...vers%26quot%3B

[toddalin]

What about a 2122? These are plentyful are reasonable.

[Robh3606]

What about a 2122?

Hello Toddalin

You must mean 2123. They are good drivers. They are included in the linked 10" comparison thread.

Rob

[Ian Mackenzie]

I am not convinced you need a sub with a pair of LE10 per box?

The LE 10 is one of Jbl best drivers and works well in a bass reflex ported enclosure

The passive radiator would need double the cone area to perform as well as a ducted port

That’s the approx equivalent of a 12 inch driver

As for crossover look at the Decade L36 spec in the Library

If your think of crossover point at 200-300 consider the 2118

The 2118 has higher sensitivity than the LE10 and is an easier driver to crossover than the 2123 for diy people
The 2118 can also operate below 100 hertz

I recommend you keep the 2231 within 1/2 a wavelength if you plan to crossover at 200 hertz

The LE 5 is engineered to operate above 900 hertz

hello, I'm deciding on a speaker to be used from 200 ~ 1000kHz crossing over to a 2" horn at 1kHz,
I've read the 2105/le5 is a strong X performer from 150 ~ 1000kHz, but how does the sound compare to
the larger brother driver le10,

could a 112/2108 be used from 200Hz. the driver is rated 4, 400Hz crossover.

because of the units i have collected so far i was thinking of a pair of dual le10/pr10 cabinets ( 2 le10 & 2 pr10 per cabinet L/R )
using and active network to control them crossing over at between 150 ~ 320Hz... with the use of a 15" sub tucked away in a corner somewhere.

please advise.

[toddalin]

May also look into a 2155J. These are nice within their range, more efficient than an LE10, but not as much as a 2123.

I paid $125 for the pair plus shipping and except for some scratches on the front of the baskets from the prior mount, they are like new. These are 16 ohm and will require crossover mods. Also, these are just a bit smaller than the typical 10" requiring a smaller baffle cut-out.





Open back (35 mfd in series):


Closed back (~1/2 cu ft, 35 mfd in series):

[ivica]

May also look into a 2155J. These are nice within their range, more efficient than an LE10, but not as much as a 2123.

I paid $125 for the pair plus shipping and except for some scratches on the front of the baskets from the prior mount, they are like new. These are 16 ohm and will require crossover mods. Also, these are just a bit smaller than the typical 10" requiring a smaller baffle cut-out.

Open back (35 mfd in series):


Closed back (~1/2 cu ft, 35 mfd in series):

Hi toddalin,

What is the scale factor applied to the amplitude axis ?
You have got very, very good price for a pair of 2251J drivers....

regards
ivica

[toddalin]

The scale is as you see it. Each horizontal line represents a span of 5 dB.

So what you see is the minimum of ~-75 dB @~420Hz to ~-61 @ ~3,800 Hz for a total span over the usable range of ~14 dB.

A 0.5 mH coil in series with the woofer reduces the 3,800 Hz peak/hump to a bit below that at ~600Hz also reducing this span. I've actually taken to winding my own coils for experimentation now that I have a meter that can read Henrys. When I do this, the crossover point works almost perfectly to the Heil on a 1st order 3.3 mfd cap with a bit of a dip between ~1 - 2.5 KHz.

It's amazing that with some of the chokes I have on hand, each wind of the coil will change the inductance by ~0.05 mH and I can wind/unwind the coil and see the results on the 61-band RTA in real time.

When I got my woofers, there was a vendor on the 'bay who had a bunch of these at this price. My pair have matching DCRs. I guess they're gone now.

[toddalin]

Hi toddalin,

You have got very, very good price for a pair of 2251J drivers....

regards
ivica

Actually, another vendor on the bay had a shiite load of 2123s that he was selling for $150/pr in excellent shape.

If anyone is looking for a nice pair of 2123s, there is a pair on C/L new in the boxes for $299/pr that have been listed off and on for a dog's age.

No affiliation.

https://losangeles.craigslist.org/ws...413973578.html

[toddalin]

Hi toddalin,

What is the scale factor applied to the amplitude axis ?
You have got very, very good price for a pair of 2251J drivers....

regards
ivica

I ported the cabinet and designed parallel passive bandpass filters and have the 2251J +- ~3 dB from <120Hz - >4,000Hz. Should do a beautiful rendition of vocals! I can't think of any JBL designs using a single driver that can achieve this.

Note the nice smooth "1st order" slope on top to the Heil, and smooth "quasi-2nd order" slope at the bottom to the 2241.