Celestion Blackback cone code?

[cryptozoo]

Anyone out there know what variations of cone codes can be found on 1970s 25-watt blackbacks? I found a set and am trying to determine if the cones are original...

[Scumback Speakers]

They should be 1777 cones, only for T1221 75 hz models, unless they're 444 55hz cones for the T1511. In a rare short period they MIGHT be RICxxx or 98700 cones, but only in mid 1974.

[cryptozoo]

Jim, thank you for the information.

[philmanatee]

The 25 watt blackbacks with the 444 cones are a pretty cool speaker, I've got a hiwatt cab I loaded with them. Phil

[Scumback Speakers]

Jim, thank you for the information.

You are welcome! I don't know much, but this I have "some experience" with.

[michele]

I resume this post 'cause i have a quad of blackbacks t1221 g12m xh28 but no codes on the cone.
Are they reconed or is it possible that there is no code on the cone?!
Thanks

[BaronGreenback]

yeah some mid 70's cone have no stamp. not sure if they are early kurt muellers or another manufacturer entirely? usually quite pale/grey looking cones the ones with no stamps. find them late 73 - 75 usually.

[Scumback Speakers]

Usually there's a code # on the cone if it's a Kurt-Mueller cone. You should have a 1777 cone on that model in white ink, but I have seen black ink, making them very hard to see. Look high up underneath the frame by the neck/smallest part of the cone, or behind a frame spoke.

I've seen them as a light grey, white and black color for the ink. Good luck!

[michele]

Take a look here it is the link!
https://picasaweb.google.com/1067190075 ... directlink" onclick="window.open(this.href);return false;

[Scumback Speakers]

The cone in that speaker looks to be original with the correct doping around the edge and the dust cap.

[michele]

Thank you.
I was waiting for your opinion because i know you are one of the most experienced man on the world about this subject.
thanks a lot
Michele
And so also in '75 there has been some cone with no code...

[Scumback Speakers]

There have always been partial stamps and missing numbers in the cone stamps from day one. I have my cones made by Kurt-Mueller and they're customized with a cone # in white on them now for the latest models. Sometimes they don't get a complete stamp on them, or it's overstamped so that a 3 looks like an 8.

That's why knowing the cone contruction, rib type, # of ribs, etc is important to know (for me at least!).

There was a period from late 73 thru mid 74 where the cone # stamps were missing almost entirely for 8-10 months, then they showed back up. Go figure. One too many pints of beer at the pub during lunch maybe, who knows! LOL

[awangotango]

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