Hep ID'ing JBL 12 inch

[mrmuse]

I bought 2 JBL 4622A cabs and thought they had E120's, well that's what I get for thinking. 2 E120's and 2 unknown, one in each so weight was same. They look the same while in the cabs, but completely different once I pulled them. I need some help Id'ing these. Only numbers are t1221 k3, and k4.
Thanks in advance.
mrmuse

60390603916039260393

[badman]

Material for the e-waste recyclers, I'd say.

It's been "serviced", and certainly doesn't look like it has any consistent pedigree.

[mrmuse]

Material for the e-waste recyclers, I'd say.

It's been "serviced", and certainly doesn't look like it has any consistent pedigree.

Explain please, as they sound as good as the E120's they were paired with.

mrmuse

[martin2395]

Looks like a Celestion to me :dont-know:

+
I searched in google for Celestion T1221 and it came up with Celestion Greenback G12M!

60394
The chassis looks the same but it misses the green magnet cover though i've never seen a G12 with a cone like that, maybe it's a hybrid?
Apparently NOT a speaker you'd throw in a dumpster......

[mrmuse]

So did I, same thing. Except no screws in a celestion. Also went through my JBL stuff. Vintage cone,
cork gasket????

mrmuse



Looks like a Celestion to me :dont-know:

+
I searched in google for Celestion T1221 and it came up with Celestion Greenback G12M!

60394

[martin2395]

The screws are located under the Celestion label / magnet cover. It's a G12M chassis for sure but I think it's a hybrid with RCF/Beyma cone or something like that.

[mrmuse]

You're probably right. Never took my Marshalls apart to see a Celestion. They sound great. Any idea on what they are worth?

Thanks
mrmuse



The screws are located under the Celestion label / magnet cover. It's a G12M chassis for sure but I think it's a hybrid with RCF/Beyma cone or something like that.

[badman]

The magnet appears badly damaged, and it's a ceramic driver, with no pedigree- hence my "rubbish heap" assessment. The magnet appears to be cracked all the way through in one spot.

[mrmuse]

Sorry, dozed off.
Magnet on one has tiny damage. What you're seeing is a two piece magnet. Photos were on cell phone. I have batteries on recharge now for good camera. Shouldn't take too long.
I emailed the seller on these, a church who claims they were installed in the mid to late 80's, which would fit the dates on the E120's. Also said records show they weren't worked on at all since local sound company installed them.
I'm wondering if the sound company swapped out one in each cabinet for some reason as they look and sound identical in the cabs.
mrmuse




The magnet appears badly damaged, and it's a ceramic driver, with no pedigree- hence my "rubbish heap" assessment. The magnet appears to be cracked all the way through in one spot.

[mrmuse]

Since you pointed me to Celestion I founf this:
vintage-rare-guitar-speaker-celestion

http://www.amps-n-bits.com/guitar-speakers/celestion-guitar-speakers/celestion-guitar-speakers.htm

Celestion (Thames Ditton) 25 Watts, 16 Ohms, Bass Resonance 75 c/s
Model: G12M. Date Code: KF3 & KF4 (June 3rd, June 4th, 1975). Frame Code: T1221.
60397603986039960400




Sorry, dozed off.
Magnet on one has tiny damage. What you're seeing is a two piece magnet. Photos were on cell phone. I have batteries on recharge now for good camera. Shouldn't take too long.
I emailed the seller on these, a church who claims they were installed in the mid to late 80's, which would fit the dates on the E120's. Also said records show they weren't worked on at all since local sound company installed them.
I'm wondering if the sound company swapped out one in each cabinet for some reason as they look and sound identical in the cabs.
mrmuse

[BMWCCA]

Since you pointed me to Celestion I founf this:
vintage-rare-guitar-speaker-celestion

http://www.amps-n-bits.com/guitar-speakers/celestion-guitar-speakers/celestion-guitar-speakers.htm

Celestion (Thames Ditton) 25 Watts, 16 Ohms, Bass Resonance 75 c/s
Model: G12M. Date Code: KF3 & KF4 (June 3rd, June 4th, 1975). Frame Code: T1221.


And someone stuck an aluminum dome on there to confuse you!

[mrmuse]

No, research is showing they made them w/aluminum dust cover. For extended HF. Date back to 73,
Pair on Ebay here: http://www.ebay.com/itm/VINTAGE-CELESTION-T1221-GREENBACK-SPEAKERS-1972-1973-EXCELLENT-CONDITION-/321228670890?pt=US_Pro_Audio_Speakers_Monitors&hash=item4acab887aa





And someone stuck an aluminum dome on there to confuse you!

[DogBox]

Hope you find this useful... Plenty more in the library...

http://www.lansingheritage.org/images/jbl/catalogs/1980-pro/page14.jpg

http://www.jblpro.com/pub/components/eseries.pdf [this one I googled for, - another good way]

Might notice E-120 has 'smooth' cone..

:)

DogBox