Just a basic review for anyone that might be interested in new speakers (or probably the 4-5 silent googlers that will find this looking for reviews haha), I've experimented a lot so this is all from my personal experience. The winners so far are the combination of 2x Celestions "Hot 100" G12T100 on top and 2x Eminence Legend 121 on the bottom.
The main style of playing and tone type is metal / 90's death metal / 90's hardcore, tunings B standard and E standard.
Cab used is Genz Benz G-Flez 4x12 ported, amp used is mainly ENGL E570 preamp into VHT 2150 2x100w power amp.
- Eminence GBE75 speakers 75watts (Genz Benz Custom model):
Those speakers were the original one that came with the cab, and I must say they were nice, pretty tight and thick but definitely on the dark side and not very biting in the mid to high frequencies, that's what it lacked to me, and lacking growling sub bass response. Also, not enough headroom for me, they kind of peaked quickly at high volume.
LOW END: Chunky with a good thump, tight on the palm muted notes but not a lot of sub frequencies. Palm muted chords sounded like "CHUD CHUD CHUD CHUD CHUD" (and not "TCHUD")
MIDS: Very straight-forward and more in the middle mids than high mids or low mids, very balanced but this can make the speaker seem a bit dark, there is practically no fizz.
HIGHS: Very rolled-off, once again a little on the dark side which is not a bad thing if you're looking for a very dry and thick tone.
- Eminence Swamp Thang 150watts:
They kept being described at "thick" and "chunky" with a lot of bass so I gave them a try, but found out that the low frequencies were really airy, and that they lacked bite as well. For a 150 watts speaker, they peaked quickly and ended up being all low mids, no character.
LOW END: There is definitely a thump there but to me it's not chunky at all, sort of reacted like an EVM12L but with less bass, very sterile and dry. Imagine palm muted chord sounding like "DUH DUH DUH DUH DUH"...
MIDS: Something weird going there in the low mids, no growl whatsoever, can't make em grind much.
HIGHS: Well I haven't heard much highs except maybe the residual vibration from the low mids hahaha.
- Eminence Legend Custom 120watts (Vader model):
These speakers are definitely amazing, apparently very similar to the Legend V12, good chunky low end slightly scooped in the low mids and a nice upper-mid grind and smooth highs. This speaker reminds me of a Celestion CL-80 / Mesa MC-90 (which to me is sort of in between a G12T75 and a V30). They had a lot of headroom due to high wattage but kind of peaked in the bass and at some point it was too fizzy at high volume.
LOW END: Definitely not overbearing but very thick and very chunky on the palm muted chords which sounded like "JUD JUD JUD JUD JUD" (not like "DJUD", more "JUD").
MIDS: Mids are just nice and biting but not as piercing as a Celestion V30.
HIGH: A little fizzy but less than a G12T-75, kind of rolled-off but you can still hear them.
- Eminence Legend 121 150watts:
Alright so now this is where it's at, this speaker is just amazing, not fizzy but biting, a lot of bass and growl, amazing. Apparently a very American sounding speaker that usually would be used with Frender combos (whatever). For the headroom at 150watts, it's nice at high volume, loses a bit of bass but retains its character and doesn't become too warbly.
LOW END: This speaker has a very wide low end kind of like a G12T-75 but definitely tighter and grindier. Palm muted chords go sort of "TCHUN TCHUN TCHUN TCHUN TCHUN".
MIDS: This speaker is scooped but there is something in the mids, a dark deadly growl.
HIGHS: The highs are VERY rolled off but they are still there and I can hear them bite, good.
And finally for the second pair I went back to my former love...
- Celestion G12T-100 "Hot 100" 100 watts:
Well I feel like this speaker gets so much hate (everyone says K100 is a better model blah blah blah) and honestly I had the K100 in the same cab and while YES they were tighter and had a good thump, but the T100 is thicker and warmer in the BASS and colder in the mids, which is what I'm looking for here. The T100 handles the bass better too, you can turn up the bass knob and they will spit it out like a thick warm chunk.
LOW END: Well thick, dark, and you can turn the bass knob on your amp there speakers CAN take it. They still have some grind but not as much as the Eminence Legend 121. And yes finally the palm muted chords go "CHUG CHUG CHUG CHUG CHUG" (and less like "TCHUG" but there it still some T kind of like "(t)CHUG").
MIDS: Yeah ok scooped, I admit it, but the dark mids of the Legend 121 will compliment it and all will be fine.
HIGHS: Perfect grindy highs, aggressive but really really not as much as the G12T-75, the T100 is definitely different in that matter.
I put the 2 Emi Legend 121 on the bottom of the cab on the top since they have a lot of bass and are louder, and the two Celestion T100 on top to fill the sound a bit more. So I have the TCHUN and CHUG = TCHUNG.