2118H - very low output ? Help

[ratitifb]

After more than 12 hours breakin test @ 6Vrms/20Hz, impedance curves are exactly the same. Neither Fs neither Zmax have been increased or decreased after "exercise" so unfortunately I don't have to post my new results...

Regarding the printed white numbers on the back of the paper cones both have the JBL #62356.

[ratitifb]

Does anyone know the maximum voltage at 20Hz before damage due to cone excursion and/or voice coil moving limitation ?[/speaker in free field without enclosure load]

[Earl K]

Hi Francois,

- Too bad about the lack of extra breakin ( or in this case , this being a mature breakin ) .

- Now, I'd use these 2118J as is, if they are being put into a sealed sub-enclosure, passively crossed over above 225 hz .

- Everything looks original to my eyes . But then, only a reconer will recognize those parts numbers on the cone ( maybe one will weigh in to this , at some point ).
- You got a great deal on the purchase of these two / so I wouldn't let these "out of spec" stats bother you too much .

[ratitifb]

Thanks a lot Earl for quieting my brain. Nothing is perfect ... in this world even with JBL !

I'll put that 2118J pair into a sealed sub-enclosure, passively crossed over above 250 Hz as suggested in another thread I have posted

http://audioheritage.csdco.com/vbull...ad.php?t=14629

What about knowing the maximum voltage at 20Hz before 2118J damage due to cone excursion and/or voice coil moving limitation ? [speaker in free air without sub-enclosure load]

Does anyone could let me know ?