Jbl 2121 or 2122 out of ????

[bldozier]

Hello,
Im looking for information how to construct a 2121 or 2122a
So far ive found
Le10a
E110? Ferrite
Le111a
K110
Is this correct.
I wonder how the e110 will compare in sq.

http://www.audioheritage.org/vbullet...2121-2122-2123
http://www.audioheritage.org/vbullet...5-2121-vs-2123

[1audiohack]

I am not quite sure what your question is.

The E110 basket/motor is identical to the 2121H basket, in every respect so a C8R2121 cone kit in a E110 basket becomes a proper 2121H, minus the foil cal sticker.

Is that helpful?

Barry.

[bldozier]

With research I see the le10 is 16ohm, not usable in place of 2121 on the 3145.
The alnico version is what the questions pertained

Was unsure if the e110 was in fact ferrite.

Can you reflect if the if the k110 would be identical to the 2121 non ferrite. (A)
Brian...

[1audiohack]

Hi Brian;

I am sorry to say that I don't have solid knowledge going that far back.

I will look some this evening.

Barry.

[ivica]

With research I see the le10 is 16ohm, not usable in place of 2121 on the 3145.
The alnico version is what the questions pertained

Was unsure if the e110 was in fact ferrite.

Can you reflect if the if the k110 would be identical to the 2121 non ferrite. (A)
Brian...

Hi bldozier,

JBL E110 is Fe type magnet, while K110 is AlNiCo magnet. 2121 is AlNiCo magnet too, but 2121H, 2122H, 2123H are Fe-type magnet, so E110 basket can be used to recone as 2123H, 2122H...
If you have clean e110, I would suggest you to try it with 3145 prior to do reconinig, may be you will be satisfied with the sound.
May be covering its aluminum dist cap with cardboard one, can make it 'less metallic sounding'


regards
ivica

[martin2395]

Is it even possible for a speaker to sound 'metallic' in the 300Hz-1000Hz region? Just curious.

[bldozier]

Alright thats a rise in compatibility, so far so good.
Maybe some knows about the
K110s compatibility.
Brian.

Thanks,
Ivica.

[ivica]

Alright thats a rise in compatibility, so far so good.
Maybe some knows about the
K110s compatibility.
Brian.

Thanks,
Ivica.

Hi

K110 can be used as E110 too, but as it has AlNiCo magnet motor, the problem of it "magnet strength" can be a problem, as may be has to be re-magnetized.

regards
ivica

[more10]

Hopefully the recone kit is still available : http://www.jblproservice.com/pdf/Goe...nto%20List.pdf

The combination is not listed, http://www.audioheritage.org/vbullet...ne+Basket+list

[more10]

Interesting old thread: http://www.audioheritage.org/vbullet...2121-2122-2123

[more10]

This is also interesting http://www.audioheritage.org/vbullet...5-2121-vs-2123

[Mike Caldwell]

Somewhere I remember reading that the K110 had a tighter voice coil gap than the E110 making alignment of a new recone kit in an old K series frame tricky at best.

[more10]

The only 2121 replacement cones I found was at Orange County, including reconing: http://www.speakerrepair.com/page/RECNEPRC.html

Anyone got experience with "OCS parts" cones? Half the price and probably made in US :-)

Mårten

[1audiohack]

Jbl had them (C8R2121) on the shelf last month, I bought eight.

I will check and see if they still have shelf stock if you are interested.

Barry.

[more10]

Jbl had them (C8R2121) on the shelf last month, I bought eight.

I will check and see if they still have shelf stock if you are interested.

Barry.

I am interested in two, depending on price of course. PM me.