Celestion G12K-100's are one of the best speakers around. Try to say I'm wrong.

[mooncobra]

You are wrong.

 

[stephen sawall]

I put a pair of G12K85 in the bottom of a Mesa Standard oversized 4x12 with a pair of Vintage 30 on top - two weeks ago.
This was my favorite combination back in the 90's.
So far I have only used it with a Orange OR50 built in April of 2012. Sounds good to me.

 

[ultimatemetalguitartones]

I put a pair of G12K85 in the bottom of a Mesa Standard oversized 4x12 with a pair of Vintage 30 on top - two weeks ago.
This was my favorite combination back in the 90's.
So far I have only used it with a Orange OR50 built in April of 2012. Sounds good to me.

Been thinking of doing the same ...

 

[Speeddemon]

Yep, used that combination in both a 2x12 that I sold (because of space constraints and too much cabs) and in my Engl Pro 4x12 it's still 2 K85's + 2 V30's.
Brings the punch, definition and thump.

 

[DanTravis62]

It's situationally good.

I like K100s with bright or scooped amps with more modern high gain, like a 5150 or ENGL

Personally I don't think they sound as good as classic lead 80s or k85s, but that's just personal preference

Most of the time, there's other speakers that I would prefer, but I certainly wouldn't be disappointed with k100s in a cab as backline or whatever

 

[NowYou'rePlayingWithPower]

I had used them for a while in an x pattern with v30s and like them well enough to not be seeking out other ones for their purpose. Right now they're all in a ported Randall 4x12 and sound pretty good. Not as good with the v30s, but better than the redbacks by themselves did in that cab and my main amp. Which is a Thrasher. So, like Dan said; time and place. Was thinking of try something with my full stack like:

 

[Speeddemon]

I had used them for a while in an x pattern with v30s and like them well enough to not be seeking out other ones for their purpose. Right now they're all in a ported Randall 4x12 and sound pretty good. Not as good with the v30s, but better than the redbacks by themselves did in that cab and my main amp. Which is a Thrasher. So, like Dan said; time and place. Was thinking of try something with my full stack like:

View attachment 379832

Interesting. How are the Redbacks tonally?

If I'm not mistaken, the Thrasher is close to the Satan, which in turn was Ola's sig amp, that probably had some input to sound like the Engl Savage 60, which was Ola's favourite or one of... amp. (It's one of my faves... )
Meaning that the Thrasher is probably dry-ish, yet saturated, tight as a nun's arse and reasonably bright sounding... So speakers that add some punch and girth, and make it less overly bright on ear-level (like the top 2 speakers on a full stack) would be probably a good way to go.
Maybe a pair of G12-65's in those top 2 spots? Thick/smooth and anything but bright... but they do need real stage volume to come alive.

 

[Speeddemon]

I like K100s with bright or scooped amps with more modern high gain, like a 5150 or ENGL

Personally I don't think they sound as good as classic lead 80s or k85s, but that's just personal preference

Did you find that the K100's are much different from the K85's? I was under the impression that they were the same, and only after finding out that the K85's could handle more power, Celestion upped the number.
Full disclosure; I only have experience with K85's, not K100's.

 

[DanTravis62]

Did you find that the K100's are much different from the K85's? I was under the impression that they were the same, and only after finding out that the K85's could handle more power, Celestion upped the number.
Full disclosure; I only have experience with K85's, not K100's.

It honestly might be that the k85s were more broken in, but I thought they were less stiff

 

[NowYou'rePlayingWithPower]

Interesting. How are the Redbacks tonally?

This:

they do need real stage volume to come alive.

Haven't tested my theory, but I feel as if the redbacks would probably sound better in a 2x12. I think pushing four of them is the issue to get to whatever "Sweet spot" they have. Possible that they need more break in time as well.

If I'm not mistaken, the Thrasher is close to the Satan, which in turn was Ola's sig amp, that probably had some input to sound like the Engl Savage 60, which was Ola's favourite or one of... amp. (It's one of my faves... )
Meaning that the Thrasher is probably dry-ish, yet saturated, tight as a nun's arse and reasonably bright sounding... So speakers that add some punch and girth, and make it less overly bright on ear-level (like the top 2 speakers on a full stack) would be probably a good way to go.
Maybe a pair of G12-65's in those top 2 spots? Thick/smooth and anything but bright...

Supposedly it's a Larry design that Fortin ripped off, not an Engl? Unless those are also Larry ripoffs? Those 65s might be cool, but I'm not looking to have more speakers laying around, tbh. It sounds really good (to me, who is mostly deaf) the way I have it set up right now with the separate k100 loaded cab and v30 loaded cab so it would just be for fun if I get bored one day since I already have all those listed speakers on hand as well as some Heritage 100s and t75s I could try in different combos.

 

[Speeddemon]

Supposedly it's a Larry design that Fortin ripped off, not an Engl? Unless those are also Larry ripoffs?

Well, I've never compared (nor seen) a Larry schematic to that of the Engl, but a few things that stand out are: double/interactive gain knobs on the Savage, that, to some extent, seem to do a little bit of what the girth & grind controls do on the Larry/Fortin designs. And this already pre-filtered, Marshall-on-steroids DNA.

In the Savage, there's a Rhythm channel gain, that feeds into the Lead channel's gain. But based on where you set both, it can range the type of gain from more dry and punchy/tight, to more saturated and blunt on the lead channel. The effect of this is not as big as what I've seen on Satan/Thrasher videos though, but tonally they don't seem worlds apart. One thing I don't like about a few Fortin designs, is the over-the-top focus on tightness, that turns into 'clanky'.
And this is something that I haven't heard that much in well recorded Larry clips, nor in my Savage 60.
And awhile ago I did record a video with my Savage, boosted with a modded DOD 250, to get as close as possible to the coveted Larry sound. Even Helmut himself commented on it. (more a little compliment about my playing capabilities though, but he didn't outright dismiss my point that it was getting in that same vein, tonewise... )

Long story short, I think all of these amps can find some heritage to old Marshall designs, but with increased gain, tightness, pre-filtering, etc.

I can respect that you don't want to add even more speakers for the sake of it.
Purely for not (further... ) fuckin' up your ears in a full stack config, I'd keep the V30 on the lower side of the cab and maybe even put beam blockers in front of those. I did this with my Mesa vertical 2x12; G12-65 on top, V30+beam blocker down.

 

[thegame]

You’re not wrong. G12K100’s best attribute is being shaped round

 

[FastRedPonyCar]

I've been using a pair of K100's in my splawn 4x12 for about 12 or so years with a pair of 100w scumback H75's. Best sounding 4x12 I've ever plugged into honestly.

If I had to knock the K100's, I'd say they don't immediately come across as having a distinct character or voice the way a V30, grenback/creamback, etc has.

I've got a lead 80, a couple of M75 scumbacks, EVM12L Classic, some old UK V30's, Alnico gold, and that 100w wazacraft speaker and the K100's seem to just work with every amp/genre of music without being too polarizing of a voice or sound to turn players of specific types of music away. All the others I have, while great speakers have specific weaknesses for some styles of music or amp but great strengths with others. The K100 (and to a slightly lesser degree, the Lead 80) is just pleasantly neutral.

In the splawn cab though, they do fill in some of the low end grunt nicely as the scumbacks are more of an upper midrange focused sound.