FDP Home Page / FDP Forum / FAQ's

The FDP is made possible by the following companies and individual members like you.
Please use the links below to show them we value their sponsorship.

Jensen Loudspeakers


Guitar Center

Advertise here


Apex Tube Matching

WD Music

Amplified Parts

Yellowjackets Tube Converters

Antique Electronics Supply

Musician's Friend

* God bless America and our men and women in uniform *

* Illegitimi non carborundum! *

If you benefit and learn from the FDP and enjoy our site, please help support us and become a Contributing Member or make a Donation today! The FDP counts on YOU to help keep the site going with an annual contribution. It's quick and easy with PayPal. Please do it TODAY!

Chris Greene, Host & Founder



Find musicians
in your area!
  Search the Forums  

FDP Forum / Fender Amps: Vintage (before 1985) / Jensen C12N in a 75 Twin Reverb


usa metro detroit

Mar 19th, 2017 05:47 PM   Edit   Profile   Print Topic   Search Topic

Jensen C12N IMO sound really nice in a Twin reverb

Removed the old Fender Oxfords from my 75 TR they kinda were bland... but not bad, .. tried some Eminence "Texas Heat's" those were just way too much. Made the base frequency prominent. (i.e. more than I cared for)

Had a Jensen C12N laying about, so I bought another and put both in my TR. Totally happy... Nice balance. The originals TR's had C12N's in them I know the new RI has C12K in them ?? (70 watts a pcs) wonder why Fender used the C12k?

Anyway... The Jensen C12N are a nice choice for a TR (at 50watts two of them handles the Twin's 85 watts just fine)

Contributing Member

American Patriot

About as ordinary as you can get.
Mar 19th, 2017 06:49 PM   Edit   Profile   Print Topic   Search Topic

A C12N is just right for a TR. The last Twin Reverb I sold, a '66, had C12N's in it. I now have a '65 Pro Reverb with C12N's.

Mick Reid
Contributing Member


American-made in Oz!!
Mar 19th, 2017 10:46 PM   Edit   Profile   Print Topic   Search Topic

I've always been a fan of Jensen speakers.
I had an original Blues Dlx that I put an old C12N in and it sounded great. So much better than the stock Eminence.
I later fitted 2 x C10R's in it and I loved that set up. I have a thing for 10's btw.

If I ever get the itch to do speaker swaps in my current amps (all stock with Celestions atm) I would definitely look at Jensens again.


usa metro detroit

Mar 20th, 2017 04:46 AM   Edit   Profile   Print Topic   Search Topic

I was a little hesitant at first, the C12N being 50watts. Glad I did.

I just put some P12N ina 74 Pro Reverb (non-master) and they sound awesome! (and they are not even broke in yet!)

And now these C12N in the 75 TR! Totally dig them.

Here in the USA (on the internet mainly) Jensen gets a bad rap.. it's got to be from being bought out by an Italian company. (based on nostalgia type reasons) both the speakers I've just bought I really like and totally scratch that Fender itch.

Yea I hear Weber makes a better Jensen than Jensen. But I kinda shy away from companys that say they clone the original better than the orginal. People say "Jensens don't sound like Jensens." First, untill lately Fender hasn't put Jensen in thier amps, Second those famed Jensen of old are 45+yrs old. Who knows what those Jensens sounded like brand new? For me... these New Jensens sound great, very classic Fender and that's what I'm looking for.



Fender power to the people!
Mar 20th, 2017 07:06 AM   Edit   Profile   Print Topic   Search Topic

Who knows what they sounded like when they were new?
That would be us old farts that played on them when they were new.


usa metro detroit

Mar 20th, 2017 06:15 PM   Edit   Profile   Print Topic   Search Topic

So you can remember in the early 60's what brand new American made Jensens sounded like?

That put you close to 80, I wish I had that kind of memory...

I'm 50 and used to gig with Marshall JCM800s in the 80's and I can't tell for sure what they sounded like brand new...

IMO I like these Modern Jensens they sound great out of the box & will only get better as they age

(This message was last edited by pcalu at 09:14 PM, Mar 20th, 2017)



Mar 20th, 2017 10:07 PM   Edit   Profile   Print Topic   Search Topic

Jensen's were made right up until 1972, when they went belly up. I had '68 Ampeg GU-12, in 1973, with a Jensen C12R. I assure you, the current Italian made C12R sounds nothing like the original.


usa metro detroit

Mar 21st, 2017 06:51 PM   Edit   Profile   Print Topic   Search Topic

All I can say...

I've NOT had an amp with Jensens till now. I've always played amps with Celestions, Eminences or Oxfords. Having no preconceived notions, or nostalgia bias... I tried Jensens first time in my Black-faced 74 Pro Reverb. A pair of Alnico P12Qs right out of the box sounded amazing! Perfect fit! When those speakers are broken in, that amp is going to sound even better! (and to me that amp sounds like a 10!) I've never had a pair of speakers sound that good right out of the box (yea the amp probably has something to do with it.. but I think it's "Right speakers for the Right amp!") After trying Celestions, and Emineneces in my 75 Twin Reverb (also black faced) nothing worked. Celstions V-types were the wrong color of tone, and the Emeince Texas Heats had to much bottom end, resulting in the amp being muddy on the lower registers. I had a Jensen 2014 C12N that I pulled form the Pro.. bought another new one and dropped both in the Twin. WALA! What I heard is what I think a Twin should sound like! Again speakers sound really great right out of the box (all be it one speaker was already broken in)
love the vintage sound!

I think the modern P and C type Jensens are a real good fit in vintage Fenders, might not be good for other amps, but man they sound great with my vintage Fenders.

'JensenĀ® "reissues", after intensive research and analysis, are made to the same specifications as the original JensenĀ® speakers used by Leo Fender and others"

My exclellent results, my experiences with Jensens. I have no reason to doubht that statment.

(This message was last edited by pcalu at 09:00 PM, Mar 21st, 2017)

Steve Dallman
Contributing Member

Merrill, Wisconsin

Age is just a number...mine is big
Apr 7th, 2017 12:05 PM   Edit   Profile   Print Topic   Search Topic

I put a new C12N in my 67 blackface DR and although it was glorious clean, with any type of distortion it produced harsh, strident, piezo-like highs that sounded awful and could not be eq'd out.

No amount of break in helped. Even a beam blocker did not help. I even doped the edge...then softened the dope. No change.

Then Joe Naylor of Reverend came to the rescue, and told me to remove the hard paper dustcap and replace it with a felt one. BINGO

That speaker went from sitting on a shelf to my favorite Fender speaker. It's been in my 65 PR (actual not RI) for several years now.

I've modded some other new Jensens with that hard paper dust cap. I use some rather stiff felt from a craft store. In all cases, the speakers still had bright, clear trebles, but lost the beaming, harsh highs when using distortion, be it amp or pedal.

Friends of mine did the same with their Jensens and all were thrilled.

I would prefer a modded new C12N to the originals.

FWIW, the C12K does not have the hard paper dust cap but a mesh fabric so does not suffer from the same strident high end of the C12N. I rather like the C12K.


usa metro detroit

Apr 7th, 2017 04:15 PM   Edit   Profile   Print Topic   Search Topic

I don't hear that with the C12Ns in my Twin.

Sometimes it's the tone stack in the amp. I.e. not the right speaker for the amp...and the speaker is not a bad speaker. Just no matter what you do that speaker isn't going to work.. but its not the speaker. Case in point I tried some Emeinece Texas Heat (I know they are a good speaker I have them in another amp... wonderful speaker) but they just didn't gell in the Twin

Won't that dust cap soften with use and with age?

when you apply that felt what happens? Does it soften the treble like a Alnico? That would be cool... sort of a Ceramic-Alnico hybred. The million dollar question: "What's the long-term outcome of your modifications... will they hold up after years of playing?"

(This message was last edited by pcalu at 11:47 AM, Apr 8th, 2017)

Steve Dallman
Contributing Member

Merrill, Wisconsin

Age is just a number...mine is big
Apr 11th, 2017 07:36 AM   Edit   Profile   Print Topic   Search Topic

I have speakers from the early 60's with felt dust caps that are in fine condition. I've never seen a felt cap deteriorate. I use adhesives that last.

The hard paper dust cap beamed a harsh treble (with distortion.) Replacement with felt smoothed that high end out. I've done this to many Jensens for myself and customers (I'm a retired amp tech) as well as friends.

There has been no downside. You are right. Some speakers just don't sound right in some amps. I dislike Celestions in Fenders. But a Jensen C12N SHOULD be a perfect speaker. In a Fender, and in my DR, it sounded great clean, but not with distortion. After the mod, it sounds great, clean or with distortion. I just replaced the old Jensen in our guitar player's 65 Ampeg Reverb Rocket. I can't remember if we used a Jensen P or Q, but it had the same hard paper dust cap. I did the mod to it, and our guitar player loves it. He isn't even interested in gettting the original Jensen reconed. (I may do it anyway.)



Apr 14th, 2017 08:21 AM   Edit   Profile   Print Topic   Search Topic

The Jensen C12N is one of my favorite speakers.
I especially like the older American made ones...and in my experience a recone usually IMPROVES the sound of an old one.

It's a brighter sounding speaker and the cleans really sparkle. The overdrive is nice but a bit more buzzy than a P12N. If I had a particularly bright amp like a blackface Fender that I wanted to overdrive a lot I might go with a P12N.


usa metro detroit

Apr 14th, 2017 06:27 PM   Edit   Profile   Print Topic   Search Topic

This is my opinion with lot of gear on the internet.

Guy X talkes crap about a product that he doesn't have a clue about... guy Y reads it and believes it and then repeats it to guy Z who then does the same.. Guys X is a hack doesn't know what he's talking about & guys Y & Z are too lazy to go check out the gear themselves. Fast forward on the internet a year and the what Guys XYZ have stated is now the TRUTH!

Case in point with Jensens.. SICA Altoparlanti the Italian company who owns Jensen, has maintained all along they have faithfully reproduced the vintage speakers.. To my ears thay have. Here is a link to a video that makes as good as a case that the SICA wasn't just using marketing hype.

External link



Apr 15th, 2017 09:03 AM   Edit   Profile   Print Topic   Search Topic

Italian Jensen repros aren't the same as their American counterparts.

For example and American C12N Jensen recone kit will not work at all on an Italian Jensen because the coil is a different size.

Some sort of problem with Metric vs. English standard tooling.

There's also the fact that an older speaker magnet will change it's strength a bit as it ages.

I do think Italian Jensens come close and are a great improvement for a lot of amps using a cheaper speaker, but I still prefer a nice vintage one that's been reconed.

A touch less biting on the high end.


usa metro detroit

Apr 15th, 2017 12:50 PM   Edit   Profile   Print Topic   Search Topic

Agreed guitarcapo... Agreed. But your talking about a 50yr old magnet and cone (in some cases) that's hard to replicate without paying huge big bucks as in Tone Tubbies etc (who make a Alnico that sounds like its 50yrs old right out of the box. For only $299.00 speaker lol...

For the record I'm not saying Jensen RI's are better than other speakers, I'm giving my opinion that Jensens are a good speaker and well worth using/trying.

I think these RI will soften up with age (why wouldn't they?) mine sounded darn good right out of the box and already have gotten warmer with the high-end getting soft

Makes sense they going to be in metric, they are made in Italy. Probably very little of the original materials are used in the RI. I can see them getting the design correct though, to where the speaker replicates the signature sound waves of the vintage speaker.

I've been using Jensens for a bit now and really enjoy them. IMO they give a real nice "Vintage" tone, i.e the Vintage Alnicos and the Vintage Ceramics.

Not new guitar playing, gear or speakers, been playing and gigging since 18 (I'm 50) What I am new to is Jensen.. being primarily a Celestion and Eminence guy.

I don't normally read internet opinions (with the Jensens RI's I just tried them.. found them quite decent. ) After reading some non-professional opinions on gear site like this... they have one thinking Jensens are real junk. Had me going huh? I also have seen people write RI's don't sound like the originals. The Video kinda debunks that notion that the reissues don't sound like the originals.

Another example of ya can't always believe what you see on the internet

Contributing Member


Jul 15th, 2018 10:53 AM   Edit   Profile   Print Topic   Search Topic

I just like having a Blackface Fender how Fullerton put them together. Funny that way.

FDP Forum / Fender Amps: Vintage (before 1985) / Jensen C12N in a 75 Twin Reverb

Reply to this Topic
Display my email address             Lost your password?
Your Message:
Link Address (URL):
Link Title:

Moderators: Chris Greene  Iron Man  reverendrob  

FDP, LLC Privacy Policy: Your real name, username, and email
are held in confidence and not disclosed to any third parties, sold, or
used for anything other than FDP Forum registration unless you specifically authorize disclosure.

Internet Application Development

Copyright © 1999-2018 Fender Discussion Page, LLC   All Rights Reserved