Can anyone identify this speaker? (g12-65?)

griley

Member
Messages
252
I've just picked up an old marshall jcm800 1937 bass 2x12. I've read before that these came loaded with G12-65's. When I opened up the cab to take a look I was surprised to find that the speakers are labeled differently;

both.jpg


The G12-65 is labeled T3101, 444 cone, date code 26 march 1980.
The Marshall also has T3101, 444 cone, date code 15 feb 1980.
The speakers look the same except for the labels.
Is this speaker just a G12-65 in disguise?

Any info would be appreciated.
Cheers, George
 

jedistar

Member
Messages
177
Am sure they are the same type. Options?

1. It was made that way
2. Left hand one blew up and was replaced ? warranty job soon after purchase hence very close date....

The screws look a bit odd- some new some old ? has it been reassembled with old drivers???
 

dunara

Member
Messages
1,900
They're both G12-65s, one supplied to Marshall with the appropriate label, the other an aftermarket model (a later replacement for a damaged unit, perhaps?). It it were mine, I'd run a meter across it to make sure its the right impedance (unless, of course it's written on the speaker.) IIRC, they were available in 8 or 16 ohm versions.
 

AdmiralB

Member
Messages
3,060
Sounds like Celestion screwed up the labeling, or someone changed one of them.

Celestion's T-numbers define specific speakers, down to the labeling. A Marshall-labeled G12-65 has a different T-number than the Celestion-labeled version.

Since the T-numbers are the same, they're definitely the same speaker.
 

martyhk0

Member
Messages
161
They are both horrible speakers. Don't plug them in, they will explode. Send them to me and I will replace them with nice shiny new chinese speakers free of charge, lol!:)

Seriously, don't sweat it. They are the same exact speaker just different labels (just check the resistance with an ohmmeter if you want to be sure of the ohms). Who cares how they wound up in there. The only thing different is the label!
If you don't want them, you can easily sell them. Myself and many others who favor those speakers would be happy to pick up a nice pair.:AOK
 

griley

Member
Messages
252
cheers, guys. I thought that it probably was a g12-65 but was a bit confused by the different labels.
They are the correct impedance (it says on the speakers and I checked it.)
As they are the same speaker I guess that they are probably both original and just happen to from the time when marshall was changing from the marshall labels used in the 70's amps to the generic celestion labels that are usually in jcm800's.

The cab sounds really good, it's quite dark due to the bass cones but I'm finding it works well with my 1987x reissue.
Anyone else here use these bass G12-65's?
 

dunara

Member
Messages
1,900
That Marshall labeled speaker is not a Rola Celestion G12-65. The Marshall version of the 15 watt Rola Celestion G12-65 is a model T3120. They did not make an 8 watt version.

I presume you mean 15 OHMS, and 8 OHMS....:confused:
 

AdmiralB

Member
Messages
3,060
That Marshall labeled speaker is not a Rola Celestion G12-65. The Marshall version of the 15 watt Rola Celestion G12-65 is a model T3120. They did not make an 8 watt version.

From drtube.com:

4104 JCM800, 50W 2x12" combo

This amp is a 2x12" combo version of the 2204 head. Early models (1981 - 1983) were fitted with two Rola Celestion G12-65 T3054 or T3101 15Ω speakers but later models (1984+) were fitted with two Celestion G12M-70 15Ω speakers.


And here's a thread on the PP board:

http://www.vintageamps.com/plexiboard/viewtopic.php?t=5822&highlight=t3101

Looks like they're bass-cone versions of the G12-65. Are the cones marked "444"?
 

griley

Member
Messages
252
The Marshall version of the 15 watt Rola Celestion G12-65 is a model T3120. They did not make an 8 watt version.
Are you sure this is true of the 444 bass cone version?
 

bosstone

Member
Messages
3,396
From drtube.com:

4104 JCM800, 50W 2x12" combo

This amp is a 2x12" combo version of the 2204 head. Early models (1981 - 1983) were fitted with two Rola Celestion G12-65 T3054 or T3101 15Ω speakers but later models (1984+) were fitted with two Celestion G12M-70 15Ω speakers.


And here's a thread on the PP board:

http://www.vintageamps.com/plexiboard/viewtopic.php?t=5822&highlight=t3101

Looks like they're bass-cone versions of the G12-65. Are the cones marked "444"?

That is correct and agrees with what I said.
The 1777 cones are the ones to have. 444 cones are bass cones.
 

bosstone

Member
Messages
3,396
Are you sure this is true of the 444 bass cone version?

Yes. There were no 8 ohm Marshall labeled Rola Celestion G12-65's, regardless of cones. There may have been other Marshall labeled, versions of other Celestion speakers with the 444 cone though.
 

bosstone

Member
Messages
3,396
There certainly are Rola Celestion G12-65's with bass cones (444). I don't know what I was thinking when I wrote that. I apologize for the error.

Rola Celestion G12-65, 8 ohm = T3033
Rola Celestion G12-65, 15 ohm = T3054
Marshall labeled Rola Celestion G12-65, 15 ohm = T3120 (no 8 ohm version made)

It appears that both the Rola Celestion G12-65 and the Marshall version or the Rola Celestion G12-65, 15 ohm speakers, when equipped with the 444 bass cone share the T3101 designation.

Cone for guitar = 1777
Bass cone = 444

Rola Celestion G12-65 made speaker with the 1777 cones are much preferred for guitar.
 

Mare

Member
Messages
1
I was looking for information about speakers for my cab Marshall JCM 800 Bass series and I run on this topic these days. I wanted to change them with G12T75.

In my 1935B JCM 800 Bass series 4x12" cab there are four Celestion G12 - 65 speakers , but they have 1777 code on them. It should be code for guitar cones, right? I bought it used, 8 years ago. Explanation?

Here, in my country, Serbia, price of Celestion G12-T75 is about 85 euros. They are making them in China nowdays.

Price for G12-65 is about 160 euros.

I wanted to change them, but now I'm not shure.

I use Marshall 2203 JCM 800 Lead series 100w amp

Please help, explaine, advice, sugestion?

Image011.jpg



Image012.jpg
 




Trending Topics

Top Bottom