Big vintage celestion Q.

[vintagekiki]

You may build it as a Combo housing your 15" celestion or as separate head/cabinet, your choice.

Great suggestion Juan.
My humble help to your suggestion.
https://music-electronics-forum.com/forum/schematic-requests/9467-links-to-vox-schematics?p=603276#post603276

[Sea Chief]

"We did not understand" ?? who the heck are "we"? what on earth does this mean?! how can you not understand my OP? jeepers man. Come on vintagekiki: you cannot reply with sentences one after another that are incomprehensible. It is impossible to form the basis of communication like this.

I undersatnd the power thing, do not exceed the 30w with the amp's 30w. The resistance thing.. as Ive explained, I do not understand. I actually do not understand extention speakers tbh (why the need to 'extend'?) & as for monitor speakers I do not know what these actually are or have any relevance to gtr amps. Studio monitors?


Ok I really cannot cope now!

Thx anyway- SC.

[vintagekiki]

Sorry I can notice it's not a problem in incomprehensible communication, problem is in your ignorance of electronics.

[Dave H]

"We did not understand" ?? who the heck are "we"?

"We" are the two people in his avatar

If you don't want to build an AC4 you could look for a used Valve Junior head. It has 4,8 and 16 ohm outputs. I use mine all the time at home.

[Jazz P Bass]

Back to the original question: "an old celestion15" 16ohm 30w."
Is the speaker in a cabinet?
At a power rating of 30 watts, any amp with an output power above that rating will kill it at full volume.

[J M Fahey]

"We did not understand" ?? who the heck are "we"? what on earth does this mean?! how can you not understand my OP? jeepers man. Come on vintagekiki: you cannot reply with sentences one after another that are incomprehensible. It is impossible to form the basis of communication like this.

I undersatnd the power thing, do not exceed the 30w with the amp's 30w. The resistance thing.. as Ive explained, I do not understand. I actually do not understand extention speakers tbh (why the need to 'extend'?) & as for monitor speakers I do not know what these actually are or have any relevance to gtr amps. Studio monitors?


Ok I really cannot cope now!

Thx anyway- SC.

Who the heck are YOU by the way?

Rude ignorant on the edge of getting the taste of a boot in the seat of your pants.
Not the first time by the way.

[Sea Chief]

Back to the original question: "an old celestion15" 16ohm 30w."
Is the speaker in a cabinet?
At a power rating of 30 watts, any amp with an output power above that rating will kill it at full volume.

Hi JP.. well effectively no not in a cabinet. I have just rcvd it, & its actually a 12" not a 15" (was told its a big'un watchout.. so assumed 15").

Is that any more useable? yes I hadn't thought of putting it in the twin reverb to replace one jensen new 12" things in there if thats what you're hinting at.

It has a code on: T12 87 maybe? tricky to see last 2 digits. Also MF 14 stamped next to this on a leg, also a small stamped circle with unreadable 3 numbers next to.

Ity checks out at 14.6 ohms.

[Sea Chief]

Sorry I can notice it's not a problem in incomprehensible communication, problem is in your ignorance of electronics.

Ok vintagekiki, I agree with last part that I am ignorant of electronics. I do appreciate your trying to help, & apologies if I get a little frrustrated understanding your posts.

[Sea Chief]

"We" are the two people in his avatar

If you don't want to build an AC4 you could look for a used Valve Junior head. It has 4,8 and 16 ohm outputs. I use mine all the time at home.

Is 'building an AC4' a viable suggestion, & uses a 16 ohm speaker? Not a bad idea on the VJ front.. altho I wasn't a fan of quality of components & box, sound I thought was flat & lifeless too, but, this could've been my lowly spkr I used with it ~ way back when.

Ok so if I had a head with three 4/8/16 taps, & 3 identical speakers in a switching box, powered each speaker singularly in turn as a sound test.. what would I expect to see as difference?

[Dave H]

Not a bad idea on the VJ front.. altho I wasn't a fan of quality of components & box, sound I thought was flat & lifeless too, but, this could've been my lowly spkr I used with it ~ way back when.

Ok so if I had a head with three 4/8/16 taps, & 3 identical speakers in a switching box, powered each speaker singularly in turn as a sound test.. what would I expect to see as difference?

The VJ can be muddy especially the early ones but a few simple mods will fix that.

I'd expect your 3 identical speakers to sound almost the same.

Speakers are made in the range 4 to 16 ohms because I think there could be problems making the voice coils outside that range (Juan would know)
They come in 4, 8 and 16 ohms for convenience. For example if all amps were 8 ohms and all speakers were 8 ohms you couldn't have a 2 x 12" cabinet that matched the amp.

[Sea Chief]

hi Dave H. Ok now I get the convenience thing re. speakers' ohms ratings. What I don't get then is why amps arent all 8 ohms then.

[g1]

I think that's a pretty valid question. It would make things a lot easier. But it's not easy getting manufacturers to agree on standardized parts. It would be a lot easier if there were only one rim size for car tires too.

[Sea Chief]

I think that's a pretty valid question. It would make things a lot easier. But it's not easy getting manufacturers to agree on standardized parts. It would be a lot easier if there were only one rim size for car tires too.

I think there must be more of an 'inherrant' reason why mfrs choose a 16 ohm amp for a AC4 for eg (if this is 16 ohms) other than we want a bit bigger xyz. Surely the circuit must be constrained to a certain 'ohm' output by way nof its design.

Anyway- back to the OP. Is this (12") clestion any good? lord knows what greenback, black, cream, grey (&yellow too is it) -back celestions is a minefield of complication let alone vintage & dates & feck knows what stamp numbers signify what. John always said it was a great spkr. I think it was one of a pair he had.. shame I can't get dibs on t'other > then I can use an 8ohm amp.

8 ohm amps do tend to be the most, I think that's true: there must be a reason for this.

[vintagekiki]

Let's try to get back to the topic.
Let someone reminded us what is the problem with Big vintage celestion, so let's solve it somehow.
A vain story leads nowhere.

[Sea Chief]

Let's try to get back to the topic.
Let someone reminded us what is the problem with Big vintage celestion, so let's solve it somehow.
A vain story leads nowhere.

Please vintagekiki, I have asked as politely as I can to please not reply, as I just cannot understand your posts & it is hugely frustrating: & I have also asked you to not write personal xyz too (suggesting that I am vain/ my 'story' is vain.. is a personal comment).

I have thanked you for trying to help, so please, let that be enough said now. Ok?

Its better this, I think, than putting you on ignore after your (most of the posts) genuinely good intent.