New Celestion 12" twin cone

[ErnieM]

Just saw this on their website. Nice flat response. Just need to see some off axis measurements.

Coaxial/Twin Cone - K12H-100TC - Celestion - Guitar, Bass & Pro Audio Speakers

and

Coaxial/Twin Cone - K12H-200TC - Celestion - Guitar, Bass & Pro Audio Speakers

 

[GM]

Hmm, breakup modes/off axis roll-off begin around 8*Pi*Fs, which coincides closely with their response plots, so I imagine their off axis response will be typical of large whizzer cone drivers.

GM

 

[nigelwright7557]

The 1mm x-max is tiny.

A better option would be Fane Sovereign 12-250TC which has 5.25mm x-max and goes up to 17KHz.
I have a pair in a cabinet and they sound very good.

 

[ErnieM]

Should have done more research. Looks like they've been out awhile.

That fane looks very nice....I think I want to use it in a small bass guitar biamp rig.

 

[GM]

The 1mm x-max is tiny.

A better option would be Fane Sovereign 12-250TC which has 5.25mm x-max and goes up to 17KHz.
I have a pair in a cabinet and they sound very good.

For a bass amp, don't you want a low Xmax? I mean the most famous vintage MI drivers I'm aware were basically compression horn drivers with as little as a 1/4 mm..........

GM

 

[ErnieM]

Only for that brittle no balls vintage bass tone...I would only use one of these for practice amps or above 200hz in a biamp rig with a capable 15" or 18" under it.

 

[GM]

Big time change since I last measured a concert then, which had the bass line a full -24 dB/40 Hz referenced to 60 Hz.

GM

 

[freddi]

IIRC Beta 12LTA has a voice coil overhang of 0.08" so could be called 1mm xmax but is specified as 3.2mm xmax - (I think that is partly why it sounds meek on the attack) Altec 421 make nice clean home woofers.

 

[GM]

Indeed they do once the alum. dust cap is either damped or covered over with a paper one. They could be had for much less than a 416, so was a popular Iconic/Valencia or similar replacement or DIY clone.

GM

 

[norman bates]

Looks like a winner as a full range driver.

Legis has played with the 200tc.
Said it was better with whizzer dust cap cut off.
Took a while to stretch in the suspension.

I look forward to trying one under the TV for movies.

Norman

 

[freddi]

the Fane has very low vc inductance and around 15ohms impedance @20KHz -
ah - here's some comparisons of 12 inch fullrange - looks like Fane would be fun in a Karlson k12
http://forum.speakerplans.com/fane-12250tc-full-rangers_topic89634_page4.html

(shorting ring (?) to get this extension)

 

[freddi]

ordered one Fane TC - will see/hear how it does in a traditional Karlson - the 30 degree off plot in the link above looked relatively good.

 

[freddi]

LMAO - so the Fane is a 3 way

 

[norman bates]

Yea, the fane looks.......... odd...........
where did you order it from, and how much ?

doesn't a low qts driver work better for your clams ?

the celestion is available at partsexpress for $80.

Celestion K12H-200TC 12" 200 Watt Full Range Professional Woofer Driver 8 Ohm

and celestion's sheet on the 200tc
http://www.parts-express.com/pedocs/specs/294-2082--k12h-200tc-spec-sheet.pdf

I'd like to see a stronger qts, but that'd make even less bass with the 60hz Fs.

Here is Legis' opinion on the cele
http://www.diyaudio.com/forums/full-range/250627-celestion-k12h-200tc-eminence-12lta.html

Norman

 

[freddi]

MCM - their shipping is high at ~$18 - I think the cost with a 10% coupon was about $76 not including shipping. A stronger motor would help but never see any twin cone with much motor.

Fane 12-250TC

 

[norman bates]

well, I remember your graphs where the older eminence b102 (59oz magnet) went up higher than the newer 45oz/.39 qts

Does the fane have a shorting ring or copper cap ? That Z plot looks pretty flat.

Norman

 

[freddi]

IIRC< the Fane sheet says 1.58mH for Le. Maybe a copper cap. Neat trick with double whizzer.

 

[Bigun]

I never heard of or saw a double whizzer before - this will be interesting to follow.

 

[freddi]

seems like there was an 8 inch driver with sort of a dual whizzer a couple of years back. The ~30 degree off axis graph of that Fane by the guy who works for Blue Aran is interesting - I wonder if the Fane will kinda sound like a Nirvana 12?

 

[sippy]

I never heard of or saw a double whizzer before - this will be interesting to follow.

It will indeed!

Freddi, about those whizzer cones.....

Could you take some rough dimensional measurements of them for me so I can compare them to my 12lta, as I have a second pair nib, I could chop the whizzers down and Make a smaller/lighter inner one and then compare the two.....

norman bates wrote:
Legis has played with the 200tc.
Said it was better with whizzer dust cap cut off.
Took a while to stretch in the suspension

Legis also used 'current' to drive his speakers rather than volts..... or was it some kinda transformer betwixt the amp out-put and the speaker
He also posted about the things he did to a pair of 12LTA's as well, which I copied in part.
If I could remember the thread title with the info, I'd post a link.